diff --git a/.circleci/windows-jni/include/jni.h b/.circleci/windows-jni/include/jni.h
index f793148c1df..1fdc6f3ad69 100644
--- a/.circleci/windows-jni/include/jni.h
+++ b/.circleci/windows-jni/include/jni.h
@@ -1129,4 +1129,3 @@ JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved);
 #define JNI_ABORT       2           /* free buffer w/o copying back */
 
 #endif  /* JNI_H_ */
-
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index d1c9d91148e..dd1197b4adb 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -30,6 +30,9 @@ jobs:
           rm -r "shellcheck-${scversion}"
           shellcheck --version
           .jenkins/run-shellcheck.sh
+      - name: Ensure correct trailing newlines
+        run: |
+          (! git grep -Il '' -- . ':(exclude)**/contrib/**' ':(exclude)third_party' ':(exclude)**.expect' | tools/trailing_newlines.py || (echo "The above files do not have correct trailing newlines; please normalize them"; false))
       - name: Ensure no trailing spaces
         run: |
           (! git grep -I -no ' $' -- . ':(exclude)**/contrib/**' ':(exclude)third_party' || (echo "The above files have trailing spaces; please remove them"; false))
diff --git a/.jenkins/pytorch/perf_test/test_cpu_speed_torch.sh b/.jenkins/pytorch/perf_test/test_cpu_speed_torch.sh
index e805389aeaa..b8f98013414 100644
--- a/.jenkins/pytorch/perf_test/test_cpu_speed_torch.sh
+++ b/.jenkins/pytorch/perf_test/test_cpu_speed_torch.sh
@@ -27,4 +27,3 @@ test_cpu_speed_torch () {
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   run_test test_cpu_speed_torch "$@"
 fi
-
diff --git a/.jenkins/pytorch/perf_test/test_cpu_speed_torch_tensor.sh b/.jenkins/pytorch/perf_test/test_cpu_speed_torch_tensor.sh
index 6dc5a7b200b..c0226206075 100644
--- a/.jenkins/pytorch/perf_test/test_cpu_speed_torch_tensor.sh
+++ b/.jenkins/pytorch/perf_test/test_cpu_speed_torch_tensor.sh
@@ -27,4 +27,3 @@ test_cpu_speed_torch_tensor () {
 if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
   run_test test_cpu_speed_torch_tensor "$@"
 fi
-
diff --git a/android/test_app/app/src/main/res/layout/activity_main.xml b/android/test_app/app/src/main/res/layout/activity_main.xml
index c0939ebc0eb..556839a994c 100644
--- a/android/test_app/app/src/main/res/layout/activity_main.xml
+++ b/android/test_app/app/src/main/res/layout/activity_main.xml
@@ -14,4 +14,4 @@
         android:background="@android:color/black"
         android:textColor="@android:color/white" />
 
-</FrameLayout>
\ No newline at end of file
+</FrameLayout>
diff --git a/aten/src/ATen/NumericUtils.h b/aten/src/ATen/NumericUtils.h
index e6726602bbd..ecac8cfe3dc 100644
--- a/aten/src/ATen/NumericUtils.h
+++ b/aten/src/ATen/NumericUtils.h
@@ -105,4 +105,3 @@ C10_HOST_DEVICE inline double tan<double>(double x) {
 }
 
 } // namespace at
-
diff --git a/aten/src/ATen/cpu/vec256/vsx/vec256_complex_double_vsx.h b/aten/src/ATen/cpu/vec256/vsx/vec256_complex_double_vsx.h
index 86133586112..d4f76197c6e 100644
--- a/aten/src/ATen/cpu/vec256/vsx/vec256_complex_double_vsx.h
+++ b/aten/src/ATen/cpu/vec256/vsx/vec256_complex_double_vsx.h
@@ -594,4 +594,3 @@ Vec256<ComplexDbl> inline minimum(
 } // namespace
 } // namespace vec256
 } // namespace at
-
diff --git a/aten/src/ATen/cpu/vec256/vsx/vsx_helpers.h b/aten/src/ATen/cpu/vec256/vsx/vsx_helpers.h
index 61a572e1abc..a9ccf5543ba 100644
--- a/aten/src/ATen/cpu/vec256/vsx/vsx_helpers.h
+++ b/aten/src/ATen/cpu/vec256/vsx/vsx_helpers.h
@@ -386,4 +386,3 @@ const vfloat64 vd_pi_2 = vfloat64{M_PI / 2.0, 0.0};
 } // namespace
 } // namespace vec256
 } // namespace at
-
diff --git a/aten/src/ATen/cudnn/cudnn-wrapper.h b/aten/src/ATen/cudnn/cudnn-wrapper.h
index 66a926fe577..0358b15c117 100644
--- a/aten/src/ATen/cudnn/cudnn-wrapper.h
+++ b/aten/src/ATen/cudnn/cudnn-wrapper.h
@@ -13,4 +13,3 @@
 
 #undef STRINGIFY
 #undef STRING
-
diff --git a/aten/src/ATen/div_rtn.h b/aten/src/ATen/div_rtn.h
index 7b6beec4b06..f9cafb8ed1a 100644
--- a/aten/src/ATen/div_rtn.h
+++ b/aten/src/ATen/div_rtn.h
@@ -8,4 +8,3 @@ static inline T div_rtn(T x, T y) {
     if ((r!=0) && ((r<0) != (y<0))) --q;
     return q;
 }
-
diff --git a/aten/src/ATen/native/Cross.h b/aten/src/ATen/native/Cross.h
index 35f9886b2b0..5517f601e6a 100644
--- a/aten/src/ATen/native/Cross.h
+++ b/aten/src/ATen/native/Cross.h
@@ -10,4 +10,3 @@ using cross_fn = void(*)(Tensor&, const Tensor&, const Tensor&, const int64_t d)
 DECLARE_DISPATCH(cross_fn, cross_stub);
 
 }} // namespace at::native
-
diff --git a/aten/src/ATen/native/batch_norm.h b/aten/src/ATen/native/batch_norm.h
index 9ff05b70ccd..bd78a5b7ebe 100644
--- a/aten/src/ATen/native/batch_norm.h
+++ b/aten/src/ATen/native/batch_norm.h
@@ -15,4 +15,3 @@ DECLARE_DISPATCH(batch_norm_fn, batch_norm_cpu_inference_contiguous_stub);
 } // namespace native
 
 } // namespace at
-
diff --git a/aten/src/ATen/native/cpu/CrossKernel.cpp b/aten/src/ATen/native/cpu/CrossKernel.cpp
index 0d405447bc1..55e02295a9f 100644
--- a/aten/src/ATen/native/cpu/CrossKernel.cpp
+++ b/aten/src/ATen/native/cpu/CrossKernel.cpp
@@ -75,4 +75,3 @@ static void cross_kernel_impl(Tensor& result, const Tensor& a, const Tensor& b,
 REGISTER_DISPATCH(cross_stub, &cross_kernel_impl);
 
 }} // namespace at::native
-
diff --git a/aten/src/ATen/native/cuda/CrossKernel.cu b/aten/src/ATen/native/cuda/CrossKernel.cu
index d03ee0009cd..31fd2a90887 100644
--- a/aten/src/ATen/native/cuda/CrossKernel.cu
+++ b/aten/src/ATen/native/cuda/CrossKernel.cu
@@ -12,4 +12,3 @@ void cross_kernel_impl(Tensor& result, const Tensor& x1, const Tensor& x2, const
 REGISTER_DISPATCH(cross_stub, &cross_kernel_impl);
 
 }}
-
diff --git a/aten/src/ATen/native/cuda/EmbeddingBackwardKernel.cuh b/aten/src/ATen/native/cuda/EmbeddingBackwardKernel.cuh
index e483550dc1e..960b28afb8c 100644
--- a/aten/src/ATen/native/cuda/EmbeddingBackwardKernel.cuh
+++ b/aten/src/ATen/native/cuda/EmbeddingBackwardKernel.cuh
@@ -33,4 +33,4 @@ Tensor embedding_backward_cuda_kernel(
     const Tensor &bag_size = Tensor(),
     const Tensor &per_sample_weights = Tensor());
 
-}}
\ No newline at end of file
+}}
diff --git a/aten/src/ATen/native/quantized/cpu/kernels/README.md b/aten/src/ATen/native/quantized/cpu/kernels/README.md
index dc3f6cfe14d..c3685ac9d69 100644
--- a/aten/src/ATen/native/quantized/cpu/kernels/README.md
+++ b/aten/src/ATen/native/quantized/cpu/kernels/README.md
@@ -13,4 +13,4 @@
     IS THE CASE CAN LEAD TO HARD-TO-DEBUG ODR VIOLATIONS.
   - **Make sure different variants of the code (AVX, AVX2) are tested!**
     There are build variants that do things like have NO AVX and NO AVX2 in
-    CI. Make sure they work!
\ No newline at end of file
+    CI. Make sure they work!
diff --git a/aten/src/ATen/native/quantized/cpu/qnnpack/CONTRIBUTING.md b/aten/src/ATen/native/quantized/cpu/qnnpack/CONTRIBUTING.md
index cd6b1221a07..9a17a037b69 100644
--- a/aten/src/ATen/native/quantized/cpu/qnnpack/CONTRIBUTING.md
+++ b/aten/src/ATen/native/quantized/cpu/qnnpack/CONTRIBUTING.md
@@ -31,4 +31,4 @@ outlined on that page and do not file a public issue.
 
 ## License
 By contributing to QNNPACK, you agree that your contributions will be licensed
-under the LICENSE file in the root directory of this source tree.
\ No newline at end of file
+under the LICENSE file in the root directory of this source tree.
diff --git a/aten/src/ATen/test/NamedTensor_test.cpp b/aten/src/ATen/test/NamedTensor_test.cpp
index 0872d926594..d1468ac0680 100644
--- a/aten/src/ATen/test/NamedTensor_test.cpp
+++ b/aten/src/ATen/test/NamedTensor_test.cpp
@@ -233,5 +233,3 @@ TEST(NamedTensorTest, TensorNamesCheckUnique) {
     ASSERT_THROW(tensornames.checkUnique("op_name"), c10::Error);
   }
 }
-
-
diff --git a/aten/src/ATen/test/cuda_complex_math_test.cu b/aten/src/ATen/test/cuda_complex_math_test.cu
index fe444a78e7b..ddc60dfd2ab 100644
--- a/aten/src/ATen/test/cuda_complex_math_test.cu
+++ b/aten/src/ATen/test/cuda_complex_math_test.cu
@@ -35,4 +35,3 @@ __global__ void CUDA##a##b()
 #define C10_DEFINE_TEST(a, b) TEST(a##Host, b)
 #define C10_ASSERT_NEAR(a, b, tol) ASSERT_NEAR(a, b, tol)
 #include <c10/test/util/complex_math_test_common.h>
-
diff --git a/aten/src/ATen/test/pow_test.cpp b/aten/src/ATen/test/pow_test.cpp
index c865f050dc4..948841ae36a 100644
--- a/aten/src/ATen/test/pow_test.cpp
+++ b/aten/src/ATen/test/pow_test.cpp
@@ -364,4 +364,3 @@ TEST(PowTest, TestIntegralPow) {
   test_inverse(longs);
   test_inverse(ints);
 }
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTBool.cu b/aten/src/THC/generated/THCTensorMathCompareTBool.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTBool.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTBool.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTByte.cu b/aten/src/THC/generated/THCTensorMathCompareTByte.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTByte.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTByte.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTChar.cu b/aten/src/THC/generated/THCTensorMathCompareTChar.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTChar.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTChar.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTDouble.cu b/aten/src/THC/generated/THCTensorMathCompareTDouble.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTDouble.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTDouble.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTFloat.cu b/aten/src/THC/generated/THCTensorMathCompareTFloat.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTFloat.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTFloat.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTHalf.cu b/aten/src/THC/generated/THCTensorMathCompareTHalf.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTHalf.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTHalf.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTInt.cu b/aten/src/THC/generated/THCTensorMathCompareTInt.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTInt.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTInt.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTLong.cu b/aten/src/THC/generated/THCTensorMathCompareTLong.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTLong.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTLong.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/aten/src/THC/generated/THCTensorMathCompareTShort.cu b/aten/src/THC/generated/THCTensorMathCompareTShort.cu
index 17e2a4f72a3..9624e950fe1 100644
--- a/aten/src/THC/generated/THCTensorMathCompareTShort.cu
+++ b/aten/src/THC/generated/THCTensorMathCompareTShort.cu
@@ -1,3 +1,2 @@
 #include <THC/THCTensorMathCompareT.cuh>
 #include <THC/THCTensor.hpp>
-
diff --git a/benchmarks/README.md b/benchmarks/README.md
index 56b3159e5ea..3665818ab2d 100644
--- a/benchmarks/README.md
+++ b/benchmarks/README.md
@@ -26,4 +26,3 @@ python -c "import torch; print(torch.__version__)"
 Please refer to each subfolder to discover each benchmark suite
 
 * [Fast RNNs benchmarks](fastrnns/README.md)
-
diff --git a/benchmarks/fastrnns/README.md b/benchmarks/fastrnns/README.md
index 830190e2833..7cd51d4356c 100644
--- a/benchmarks/fastrnns/README.md
+++ b/benchmarks/fastrnns/README.md
@@ -39,4 +39,3 @@ you can also specify the models to generate nvprof files separately:
 
 Use Linux for the most accurate timing. A lot of these tests only run
 on CUDA.
-
diff --git a/c10/util/Optional.cpp b/c10/util/Optional.cpp
index dd91391719b..ce2ee24e35d 100644
--- a/c10/util/Optional.cpp
+++ b/c10/util/Optional.cpp
@@ -7,4 +7,4 @@
 #if (!defined(__CUDA_ARCH__) || !defined(CUDA_VERSION) || CUDA_VERSION > 9200)
 static_assert(C10_IS_TRIVIALLY_COPYABLE(c10::optional<int>), "c10::optional<int> should be trivially copyable");
 static_assert(C10_IS_TRIVIALLY_COPYABLE(c10::optional<bool>), "c10::optional<bool> should be trivially copyable");
-#endif
\ No newline at end of file
+#endif
diff --git a/c10/util/Unicode.cpp b/c10/util/Unicode.cpp
index e6d41bc7318..1c7eefc57b5 100644
--- a/c10/util/Unicode.cpp
+++ b/c10/util/Unicode.cpp
@@ -46,4 +46,4 @@ std::string u16u8(const std::wstring& wstr) {
     return str;
 }
 #endif
-}  // namespace c10
\ No newline at end of file
+}  // namespace c10
diff --git a/caffe2/core/common_test.cc b/caffe2/core/common_test.cc
index 4e9b65828a8..7de0a737099 100644
--- a/caffe2/core/common_test.cc
+++ b/caffe2/core/common_test.cc
@@ -41,5 +41,3 @@ TEST(CommonTest, TestStod) {
 #endif // __ANDROID__
 
 }  // namespace caffe2
-
-
diff --git a/caffe2/core/nomnigraph/tests/AlgorithmsTest.cc b/caffe2/core/nomnigraph/tests/AlgorithmsTest.cc
index e0de91bb2ad..65f8ad5f88c 100644
--- a/caffe2/core/nomnigraph/tests/AlgorithmsTest.cc
+++ b/caffe2/core/nomnigraph/tests/AlgorithmsTest.cc
@@ -123,4 +123,3 @@ TEST(Subgraph, InduceEdgesCycle) {
     EXPECT_TRUE(sg.hasEdge(edge));
   }
 }
-
diff --git a/caffe2/onnx/device.cc b/caffe2/onnx/device.cc
index 7808c54f307..9dd2d1c76c3 100644
--- a/caffe2/onnx/device.cc
+++ b/caffe2/onnx/device.cc
@@ -15,4 +15,3 @@ Device::Device(const std::string &spec) {
   device_id = atoi(spec.substr(pos + 1).c_str());
 }
 }}
-
diff --git a/caffe2/operators/roi_align_op.cc b/caffe2/operators/roi_align_op.cc
index 02120137465..2367e525b93 100644
--- a/caffe2/operators/roi_align_op.cc
+++ b/caffe2/operators/roi_align_op.cc
@@ -312,4 +312,3 @@ C10_EXPORT_CAFFE2_OP_TO_C10_CPU(
     "    bool aligned"
     ") -> Tensor",
     caffe2::RoIAlignCPUOp<float>);
-
diff --git a/caffe2/opt/optimizer.cc b/caffe2/opt/optimizer.cc
index 2e707a13828..72de6d86159 100644
--- a/caffe2/opt/optimizer.cc
+++ b/caffe2/opt/optimizer.cc
@@ -45,4 +45,3 @@ NetDef optimize(NetDef net, int level) {
 
 } // namespace opt
 } // namespace caffe2
-
diff --git a/caffe2/python/CMakeLists.txt b/caffe2/python/CMakeLists.txt
index ee910e831e8..373a4fff86b 100644
--- a/caffe2/python/CMakeLists.txt
+++ b/caffe2/python/CMakeLists.txt
@@ -33,4 +33,3 @@ prepend(Caffe2_HIP_PYTHON_SRCS ${CMAKE_CURRENT_SOURCE_DIR} ${Caffe2_HIP_PYTHON_S
 set(Caffe2_CPU_PYTHON_SRCS ${Caffe2_CPU_PYTHON_SRCS} PARENT_SCOPE)
 set(Caffe2_GPU_PYTHON_SRCS ${Caffe2_GPU_PYTHON_SRCS} PARENT_SCOPE)
 set(Caffe2_HIP_PYTHON_SRCS ${Caffe2_HIP_PYTHON_SRCS} PARENT_SCOPE)
-
diff --git a/caffe2/python/convert.py b/caffe2/python/convert.py
index b4b37811de1..b3b5822c46c 100644
--- a/caffe2/python/convert.py
+++ b/caffe2/python/convert.py
@@ -1,7 +1,2 @@
 ## @package workspace
 # Module caffe2.python.workspace
-
-
-
-
-
diff --git a/caffe2/python/fakelowp/init_shared_libs.py b/caffe2/python/fakelowp/init_shared_libs.py
index 2a98de4571a..889b2bcab52 100644
--- a/caffe2/python/fakelowp/init_shared_libs.py
+++ b/caffe2/python/fakelowp/init_shared_libs.py
@@ -7,4 +7,3 @@ if 'OSS_ONNXIFI_LIB' in os.environ:
     lib = os.environ['OSS_ONNXIFI_LIB']
     print("Loading ONNXIFI lib: ".format(lib))
     ctypes.CDLL(lib, ctypes.RTLD_GLOBAL)
-
diff --git a/caffe2/python/onnx/README.md b/caffe2/python/onnx/README.md
index 441914fb16b..444951bf684 100644
--- a/caffe2/python/onnx/README.md
+++ b/caffe2/python/onnx/README.md
@@ -51,4 +51,3 @@ pip install -e caffe2/
 # License
 
 [MIT License](LICENSE)
-
diff --git a/caffe2/python/onnx/backend_cpp_rep.py b/caffe2/python/onnx/backend_cpp_rep.py
index 4a75068cfd0..322e6c2e289 100644
--- a/caffe2/python/onnx/backend_cpp_rep.py
+++ b/caffe2/python/onnx/backend_cpp_rep.py
@@ -49,4 +49,3 @@ class Caffe2CppRep(BackendRep):
             # single input
             output_values = self.__core.run([inputs])
         return namedtupledict('Outputs', self.__external_outputs)(*output_values)
-
diff --git a/caffe2/python/onnx/test_onnxifi.py b/caffe2/python/onnx/test_onnxifi.py
index 4316149d5bf..73a12061698 100644
--- a/caffe2/python/onnx/test_onnxifi.py
+++ b/caffe2/python/onnx/test_onnxifi.py
@@ -197,5 +197,3 @@ class OnnxifiTransformTest(TestCase):
             output_values = [workspace.FetchBlob(name) for name in net_outputs]
             Y_trt = namedtupledict('Outputs', net_outputs)(*output_values)
         np.testing.assert_allclose(Y_c2, Y_trt, rtol=1e-3)
-
-
diff --git a/caffe2/python/onnx/tests/__init__.py b/caffe2/python/onnx/tests/__init__.py
index fd40910d9e7..e69de29bb2d 100644
--- a/caffe2/python/onnx/tests/__init__.py
+++ b/caffe2/python/onnx/tests/__init__.py
@@ -1,4 +0,0 @@
-
-
-
-
diff --git a/caffe2/python/onnx/tests/test_utils.py b/caffe2/python/onnx/tests/test_utils.py
index bebfc101295..8585624e1af 100644
--- a/caffe2/python/onnx/tests/test_utils.py
+++ b/caffe2/python/onnx/tests/test_utils.py
@@ -27,4 +27,3 @@ class TestCase(unittest.TestCase):
         if hasattr(self, name):
             raise ValueError('Duplicated test name: {}'.format(name))
         setattr(self, name, test_func)
-
diff --git a/caffe2/python/operator_test/mean_op_test.py b/caffe2/python/operator_test/mean_op_test.py
index ee2c6fc8fbf..a549426170c 100644
--- a/caffe2/python/operator_test/mean_op_test.py
+++ b/caffe2/python/operator_test/mean_op_test.py
@@ -60,4 +60,3 @@ class TestMean(serial.SerializedTestCase):
 
 if __name__ == "__main__":
     unittest.main()
-
diff --git a/caffe2/python/rnn/__init__.py b/caffe2/python/rnn/__init__.py
index 3f2ff2d6cc8..e69de29bb2d 100644
--- a/caffe2/python/rnn/__init__.py
+++ b/caffe2/python/rnn/__init__.py
@@ -1,5 +0,0 @@
-
-
-
-
-
diff --git a/caffe2/python/serialized_test/SerializedTestCoverage.md b/caffe2/python/serialized_test/SerializedTestCoverage.md
index f98dad595b8..4e61b65ec44 100644
--- a/caffe2/python/serialized_test/SerializedTestCoverage.md
+++ b/caffe2/python/serialized_test/SerializedTestCoverage.md
@@ -876,4 +876,3 @@ Serialized tests have covered 220/852 (25.8%) operators
 * LengthsSumFakeFp16
 * SparseLengthsMax
 </details>
-
diff --git a/caffe2/python/trt/data/class_labels.txt b/caffe2/python/trt/data/class_labels.txt
index 888d6f51dd7..f40829ed0fc 100644
--- a/caffe2/python/trt/data/class_labels.txt
+++ b/caffe2/python/trt/data/class_labels.txt
@@ -997,4 +997,4 @@ earthstar
 hen-of-the-woods
 bolete
 ear
-toilet tissue
\ No newline at end of file
+toilet tissue
diff --git a/caffe2/python/trt/test_trt.py b/caffe2/python/trt/test_trt.py
index 2782cca7c13..6f9426d6a93 100644
--- a/caffe2/python/trt/test_trt.py
+++ b/caffe2/python/trt/test_trt.py
@@ -277,5 +277,3 @@ class TensorRTTransformTest(TestCase):
             output_values = [workspace.FetchBlob(name) for name in net_outputs]
             Y_trt = namedtupledict('Outputs', net_outputs)(*output_values)
         np.testing.assert_allclose(Y_c2, Y_trt, rtol=1e-3)
-
-
diff --git a/caffe2/python/trt/transform.py b/caffe2/python/trt/transform.py
index 1b201007daa..0e304ca4fae 100644
--- a/caffe2/python/trt/transform.py
+++ b/caffe2/python/trt/transform.py
@@ -106,4 +106,3 @@ def transform_caffe2_net(
     pred_net_cut = caffe2_pb2.NetDef()
     pred_net_cut.ParseFromString(pred_net_str)
     return pred_net_cut
-
diff --git a/caffe2/utils/simple_queue_test.cc b/caffe2/utils/simple_queue_test.cc
index d0cf24acbf2..f9d2fa801b6 100644
--- a/caffe2/utils/simple_queue_test.cc
+++ b/caffe2/utils/simple_queue_test.cc
@@ -68,5 +68,3 @@ TEST(SimpleQueueDeathTest, CannotAddAfterQueueFinished) {
 
 
 }  // namespace caffe2
-
-
diff --git a/cmake/Modules/FindAtlas.cmake b/cmake/Modules/FindAtlas.cmake
index 9c665a47bd5..efacda1e26a 100644
--- a/cmake/Modules/FindAtlas.cmake
+++ b/cmake/Modules/FindAtlas.cmake
@@ -49,4 +49,3 @@ if(ATLAS_FOUND)
 
   message(STATUS "Found Atlas (include: ${Atlas_CBLAS_INCLUDE_DIR}, library: ${Atlas_BLAS_LIBRARY})")
 endif(ATLAS_FOUND)
-
diff --git a/cmake/Modules/FindHiredis.cmake b/cmake/Modules/FindHiredis.cmake
index b9cb69b69a8..f1389ded586 100644
--- a/cmake/Modules/FindHiredis.cmake
+++ b/cmake/Modules/FindHiredis.cmake
@@ -21,4 +21,3 @@ if(HIREDIS_FOUND)
   message(STATUS "Found Hiredis  (include: ${Hiredis_INCLUDE_DIR}, library: ${Hiredis_LIBRARIES})")
   mark_as_advanced(Hiredis_INCLUDE_DIR Hiredis_LIBRARIES)
 endif()
-
diff --git a/cmake/Modules/FindNumPy.cmake b/cmake/Modules/FindNumPy.cmake
index a671494caba..b1b93c772bb 100644
--- a/cmake/Modules/FindNumPy.cmake
+++ b/cmake/Modules/FindNumPy.cmake
@@ -55,4 +55,3 @@ if(NUMPY_FOUND)
 endif()
 
 caffe_clear_vars(__result __output __error_value __values __ver_check __error_value)
-
diff --git a/cmake/Modules/FindNuma.cmake b/cmake/Modules/FindNuma.cmake
index 63fbe9014c1..b27b646e8a9 100644
--- a/cmake/Modules/FindNuma.cmake
+++ b/cmake/Modules/FindNuma.cmake
@@ -26,4 +26,3 @@ if(NUMA_FOUND)
       "Found Numa  (include: ${Numa_INCLUDE_DIR}, library: ${Numa_LIBRARIES})")
   mark_as_advanced(Numa_INCLUDE_DIR Numa_LIBRARIES)
 endif()
-
diff --git a/cmake/Modules/FindOpenBLAS.cmake b/cmake/Modules/FindOpenBLAS.cmake
index be9e713d16f..c909ace0a17 100644
--- a/cmake/Modules/FindOpenBLAS.cmake
+++ b/cmake/Modules/FindOpenBLAS.cmake
@@ -63,4 +63,3 @@ MARK_AS_ADVANCED(
     OpenBLAS_LIB
     OpenBLAS
 )
-
diff --git a/cmake/Modules/FindRocksDB.cmake b/cmake/Modules/FindRocksDB.cmake
index e33bcce2f85..ef7f3b5f94b 100644
--- a/cmake/Modules/FindRocksDB.cmake
+++ b/cmake/Modules/FindRocksDB.cmake
@@ -21,4 +21,3 @@ if(ROCKSDB_FOUND)
   message(STATUS "Found RocksDB  (include: ${RocksDB_INCLUDE_DIR}, library: ${RocksDB_LIBRARIES})")
   mark_as_advanced(RocksDB_INCLUDE_DIR RocksDB_LIBRARIES)
 endif()
-
diff --git a/cmake/Modules/FindSnappy.cmake b/cmake/Modules/FindSnappy.cmake
index 77fd32b85a7..97219e85075 100644
--- a/cmake/Modules/FindSnappy.cmake
+++ b/cmake/Modules/FindSnappy.cmake
@@ -24,4 +24,3 @@ if(SNAPPY_FOUND)
                      SNAPPY_VERION_LINES SNAPPY_MAJOR SNAPPY_MINOR SNAPPY_PATCHLEVEL)
   set(Snappy_VERSION "${SNAPPY_MAJOR}.${SNAPPY_MINOR}.${SNAPPY_PATCHLEVEL}")
 endif()
-
diff --git a/cmake/Modules/FindVSX.cmake b/cmake/Modules/FindVSX.cmake
index 64f67ceeb0e..304b3c90b5b 100644
--- a/cmake/Modules/FindVSX.cmake
+++ b/cmake/Modules/FindVSX.cmake
@@ -32,4 +32,3 @@ IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
   endif()
   message("-- </FindVSX>")
 endif()
-
diff --git a/cmake/Modules_CUDA_fix/upstream/FindCUDA/parse_cubin.cmake b/cmake/Modules_CUDA_fix/upstream/FindCUDA/parse_cubin.cmake
index 626c8a2e47d..25ceb49f3dd 100644
--- a/cmake/Modules_CUDA_fix/upstream/FindCUDA/parse_cubin.cmake
+++ b/cmake/Modules_CUDA_fix/upstream/FindCUDA/parse_cubin.cmake
@@ -107,5 +107,3 @@ if (NOT "${file_text}" STREQUAL "")
 else()
   # message("FOUND NO DEPENDS")
 endif()
-
-
diff --git a/cmake/public/gflags.cmake b/cmake/public/gflags.cmake
index a030fdd7d42..186cda1a909 100644
--- a/cmake/public/gflags.cmake
+++ b/cmake/public/gflags.cmake
@@ -81,4 +81,3 @@ if(NOT TARGET gflags)
       "Caffe2 or a Caffe2 dependent library, the next warning / error will "
       "give you more info.")
 endif()
-
diff --git a/cmake/public/glog.cmake b/cmake/public/glog.cmake
index a067c8dc787..bb03e81f29e 100644
--- a/cmake/public/glog.cmake
+++ b/cmake/public/glog.cmake
@@ -68,4 +68,3 @@ if(NOT TARGET glog::glog)
       "Caffe2 or a Caffe2 dependent library, the next warning / error will "
       "give you more info.")
 endif()
-
diff --git a/cmake/public/utils.cmake b/cmake/public/utils.cmake
index f7455f07804..70518520eb0 100644
--- a/cmake/public/utils.cmake
+++ b/cmake/public/utils.cmake
@@ -484,4 +484,3 @@ function(torch_set_target_props libname)
     set_target_properties(${libname} PROPERTIES STATIC_LIBRARY_FLAGS_DEBUG "/NODEFAULTLIB:${VCOMP_LIB}d")
   endif()
 endfunction()
-
diff --git a/docs/caffe2/DOXYGEN.md b/docs/caffe2/DOXYGEN.md
index 8adb34d7c89..e25aab818a8 100644
--- a/docs/caffe2/DOXYGEN.md
+++ b/docs/caffe2/DOXYGEN.md
@@ -71,4 +71,3 @@ def my_method(x, y):"""!
 ```
 
 Note that the bang (!) is added after the opening comment """! - this seems to do the trick and the remaining comments will be nicely parsed by Doxygen.
-
diff --git a/docs/cpp/Makefile b/docs/cpp/Makefile
index 00a330c754f..e244432b9fd 100644
--- a/docs/cpp/Makefile
+++ b/docs/cpp/Makefile
@@ -25,4 +25,3 @@ clean:
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
-
diff --git a/docs/source/community/persons_of_interest.rst b/docs/source/community/persons_of_interest.rst
index f346fbe994e..5c1fcbf1c7e 100644
--- a/docs/source/community/persons_of_interest.rst
+++ b/docs/source/community/persons_of_interest.rst
@@ -179,6 +179,3 @@ TorchAudio
 ~~~~~~~~~~
 
 - Vincent QB (`vincentqb <https://github.com/vincentqb>`__)
-
-
-
diff --git a/docs/source/dlpack.rst b/docs/source/dlpack.rst
index 869285de792..838c75c0f93 100644
--- a/docs/source/dlpack.rst
+++ b/docs/source/dlpack.rst
@@ -5,4 +5,3 @@ torch.utils.dlpack
 
 .. autofunction:: from_dlpack
 .. autofunction:: to_dlpack
-
diff --git a/docs/source/jit_builtin_functions.rst b/docs/source/jit_builtin_functions.rst
index 244b87e8f8b..a6cdb8c4787 100644
--- a/docs/source/jit_builtin_functions.rst
+++ b/docs/source/jit_builtin_functions.rst
@@ -8,4 +8,3 @@ This is a full reference of functions and Tensor methods accessible in TorchScri
 .. contents:: :local:
 
 .. automodule:: torch.jit.supported_ops
-
diff --git a/docs/source/notes/cpu_threading_torchscript_inference.svg b/docs/source/notes/cpu_threading_torchscript_inference.svg
index 67f8ec884a3..f09884cc5f2 100644
--- a/docs/source/notes/cpu_threading_torchscript_inference.svg
+++ b/docs/source/notes/cpu_threading_torchscript_inference.svg
@@ -678,4 +678,4 @@
        id="g530"><path
          id="path532"
          style="fill:none;stroke:#000000;stroke-width:0.47999999;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:10;stroke-dasharray:1.92, 1.44;stroke-dashoffset:0;stroke-opacity:1"
-         d="m 375,167.64 h 44.52 V 214.2 H 375 Z" /></g></g></svg>
\ No newline at end of file
+         d="m 375,167.64 h 44.52 V 214.2 H 375 Z" /></g></g></svg>
diff --git a/docs/source/notes/randomness.rst b/docs/source/notes/randomness.rst
index 68b8e74a66a..304ac3b10ae 100644
--- a/docs/source/notes/randomness.rst
+++ b/docs/source/notes/randomness.rst
@@ -149,5 +149,3 @@ Use :meth:`worker_init_fn` to preserve reproducibility::
         num_workers=num_workers,
         worker_init_fn=seed_worker
     )
-
-
diff --git a/docs/source/special.rst b/docs/source/special.rst
index 20cb8ade157..0efaf871266 100644
--- a/docs/source/special.rst
+++ b/docs/source/special.rst
@@ -24,4 +24,4 @@ Functions
 .. autofunction:: erfinv
 .. autofunction:: expm1
 .. autofunction:: exp2
-.. autofunction:: gammaln
\ No newline at end of file
+.. autofunction:: gammaln
diff --git a/docs/source/storage.rst b/docs/source/storage.rst
index 2a8a04caa0f..3aeec082b60 100644
--- a/docs/source/storage.rst
+++ b/docs/source/storage.rst
@@ -85,4 +85,3 @@ Every :class:`torch.Tensor` has a corresponding storage of the same data type.
    :members:
    :undoc-members:
    :inherited-members:
-
diff --git a/docs/source/torch.nn.intrinsic.quantized.rst b/docs/source/torch.nn.intrinsic.quantized.rst
index 042bc868fe3..eebc8c44bb5 100644
--- a/docs/source/torch.nn.intrinsic.quantized.rst
+++ b/docs/source/torch.nn.intrinsic.quantized.rst
@@ -19,5 +19,3 @@ LinearReLU
 ~~~~~~~~~~~~~~~
 .. autoclass:: LinearReLU
     :members:
-
-
diff --git a/docs/source/torch.nn.qat.rst b/docs/source/torch.nn.qat.rst
index ae1f60ad59c..428a05e38cc 100644
--- a/docs/source/torch.nn.qat.rst
+++ b/docs/source/torch.nn.qat.rst
@@ -16,6 +16,3 @@ Linear
 ~~~~~~~~~~~~~~~
 .. autoclass:: Linear
     :members:
-
-
-
diff --git a/docs/source/torch.quantization.rst b/docs/source/torch.quantization.rst
index 1ae60a7c9de..bf2461ca22d 100644
--- a/docs/source/torch.quantization.rst
+++ b/docs/source/torch.quantization.rst
@@ -65,4 +65,3 @@ Debugging utilities
     :nosignatures:
 
     nn.intrinsic
-
diff --git a/ios/TestApp/.clang-format b/ios/TestApp/.clang-format
index 8f647f49fde..b1a6788085e 100644
--- a/ios/TestApp/.clang-format
+++ b/ios/TestApp/.clang-format
@@ -5,4 +5,4 @@ AllowShortIfStatementsOnASingleLine: false
 AllowShortLoopsOnASingleLine: false
 BreakBeforeTernaryOperators: false
 ColumnLimit: 100
-PointerBindsToType: false
\ No newline at end of file
+PointerBindsToType: false
diff --git a/ios/TestApp/Gemfile b/ios/TestApp/Gemfile
index adc90d98cfc..7a118b49be7 100644
--- a/ios/TestApp/Gemfile
+++ b/ios/TestApp/Gemfile
@@ -1,3 +1,3 @@
 source "https://rubygems.org"
 
-gem "fastlane"
\ No newline at end of file
+gem "fastlane"
diff --git a/ios/TestApp/TestApp/Assets.xcassets/AppIcon.appiconset/Contents.json b/ios/TestApp/TestApp/Assets.xcassets/AppIcon.appiconset/Contents.json
index d8db8d65fd7..b542ec24d24 100644
--- a/ios/TestApp/TestApp/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/ios/TestApp/TestApp/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -95,4 +95,4 @@
     "version" : 1,
     "author" : "xcode"
   }
-}
\ No newline at end of file
+}
diff --git a/ios/TestApp/TestApp/Assets.xcassets/Contents.json b/ios/TestApp/TestApp/Assets.xcassets/Contents.json
index da4a164c918..2d92bd53fdb 100644
--- a/ios/TestApp/TestApp/Assets.xcassets/Contents.json
+++ b/ios/TestApp/TestApp/Assets.xcassets/Contents.json
@@ -3,4 +3,4 @@
     "version" : 1,
     "author" : "xcode"
   }
-}
\ No newline at end of file
+}
diff --git a/ios/TestApp/fastlane/Fastfile b/ios/TestApp/fastlane/Fastfile
index a69ffa973d4..3e8ef00f0f7 100644
--- a/ios/TestApp/fastlane/Fastfile
+++ b/ios/TestApp/fastlane/Fastfile
@@ -13,4 +13,4 @@ platform :ios do
       certificate_password: ENV["IOS_CERT_SECRET"] || "default"
     )
   end
-end
\ No newline at end of file
+end
diff --git a/modules/observers/CMakeLists.txt b/modules/observers/CMakeLists.txt
index 8796354dc82..050b8a1461e 100644
--- a/modules/observers/CMakeLists.txt
+++ b/modules/observers/CMakeLists.txt
@@ -30,4 +30,3 @@ endif()
 if(CAFFE2_CMAKE_BUILDING_WITH_MAIN_REPO)
   set(Caffe2_MODULES ${Caffe2_MODULES} caffe2_observers_library PARENT_SCOPE)
 endif()
-
diff --git a/mypy-strict.ini b/mypy-strict.ini
index 4608f7cf70f..5a466e66c43 100644
--- a/mypy-strict.ini
+++ b/mypy-strict.ini
@@ -46,6 +46,8 @@ files =
     tools/stats_utils/*.py,
     tools/test_history.py,
     tools/test/test_test_history.py,
+    tools/test/test_trailing_newlines.py,
+    tools/trailing_newlines.py,
     torch/testing/_internal/framework_utils.py,
     torch/utils/benchmark/utils/common.py,
     torch/utils/benchmark/utils/timer.py,
diff --git a/scripts/apache_header.txt b/scripts/apache_header.txt
index 67f07905fb0..b4eff258eb0 100644
--- a/scripts/apache_header.txt
+++ b/scripts/apache_header.txt
@@ -13,4 +13,3 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
diff --git a/scripts/apache_python.txt b/scripts/apache_python.txt
index f946a1a6438..bc104d88451 100644
--- a/scripts/apache_python.txt
+++ b/scripts/apache_python.txt
@@ -12,4 +12,3 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 ##############################################################################
-
diff --git a/scripts/diagnose_protobuf.py b/scripts/diagnose_protobuf.py
index f8627b60bd1..bc643b39792 100644
--- a/scripts/diagnose_protobuf.py
+++ b/scripts/diagnose_protobuf.py
@@ -88,7 +88,3 @@ if python_protobuf_installed and native_protobuf_installed:
         print(VERSION_MISMATCH)
     else:
         print('All looks good.')
-
-
-
-
diff --git a/scripts/release_notes/common.py b/scripts/release_notes/common.py
index 4312d71b544..8f1cfea23c6 100644
--- a/scripts/release_notes/common.py
+++ b/scripts/release_notes/common.py
@@ -193,4 +193,3 @@ class CommitDataCache:
         data = {commit: features._asdict() for commit, features in self.data.items()}
         with open(self.path, 'w') as f:
             json.dump(data, f)
-
diff --git a/scripts/xcode_build.rb b/scripts/xcode_build.rb
index 1175a8fab88..6fa3394eba9 100644
--- a/scripts/xcode_build.rb
+++ b/scripts/xcode_build.rb
@@ -80,4 +80,3 @@ end
 
 # run xcodebuild
 exec "xcodebuild clean build  -project #{xcodeproj_path}  -target #{target.name} -sdk #{sdk} -configuration Release PROVISIONING_PROFILE_SPECIFIER=#{profile} -arch #{arch}"
-
diff --git a/test/benchmark_utils/callgrind_artifacts.json b/test/benchmark_utils/callgrind_artifacts.json
index e59f0524a13..d4cdcdd7804 100644
--- a/test/benchmark_utils/callgrind_artifacts.json
+++ b/test/benchmark_utils/callgrind_artifacts.json
@@ -1184,4 +1184,4 @@
         "2000 build/../aten/src/TH/THAllocator.cpp:getTHDefaultAllocator() [/data/users/test_user/repos/pytorch/torch/lib/libtorch_cpu.so]",
         "2000 build/../c10/core/Allocator.h:c10::DefaultCPUAllocator::allocate(unsigned long) const"
     ]
-}
\ No newline at end of file
+}
diff --git a/test/cpp/api/dataloader.cpp b/test/cpp/api/dataloader.cpp
index 2d3cb0dfffa..1b7c1291461 100644
--- a/test/cpp/api/dataloader.cpp
+++ b/test/cpp/api/dataloader.cpp
@@ -2302,4 +2302,4 @@ TEST(DataLoaderTest, CustomPreprocessPolicy) {
       }
     }
   }
-}
\ No newline at end of file
+}
diff --git a/test/cpp/api/init_baseline.h b/test/cpp/api/init_baseline.h
index 7565d071474..1555da67a04 100644
--- a/test/cpp/api/init_baseline.h
+++ b/test/cpp/api/init_baseline.h
@@ -178,4 +178,4 @@ inline std::vector<std::vector<torch::Tensor>> Kaiming_Uniform() {
   };
 }
 
-} // namespace expected_parameters
\ No newline at end of file
+} // namespace expected_parameters
diff --git a/test/optim/test.lua b/test/optim/test.lua
index 33e47aceba3..3c5fb9f756a 100644
--- a/test/optim/test.lua
+++ b/test/optim/test.lua
@@ -30,4 +30,3 @@ for i, test in ipairs(tests) do
         end
     end
 end
-
diff --git a/tools/README.md b/tools/README.md
index 76513aa2e42..97d9204afc9 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -49,6 +49,10 @@ Developer tools which you might find useful:
   appropriate subset of our `mypy*.ini` configs.
 * [test_history.py](test_history.py) - Query S3 to display history of a single
   test across multiple jobs over time.
+* [trailing_newlines.py](trailing_newlines.py) - Take names of UTF-8 files from
+  stdin, print names of nonempty files whose contents don't end in exactly one
+  trailing newline, exit with status 1 if no output printed or 0 if some
+  filenames were printed.
 
 Important if you want to run on AMD GPU:
 
diff --git a/tools/autograd/templates/InplaceOrViewType.cpp b/tools/autograd/templates/InplaceOrViewType.cpp
index 7ecf84cb339..e24158bbc9b 100644
--- a/tools/autograd/templates/InplaceOrViewType.cpp
+++ b/tools/autograd/templates/InplaceOrViewType.cpp
@@ -30,4 +30,3 @@ TORCH_LIBRARY_IMPL(aten, InplaceOrView, m) {
 
 }  // namespace
 } // namespace torch
-
diff --git a/tools/clang_format_hash/linux64/clang-format-linux64 b/tools/clang_format_hash/linux64/clang-format-linux64
index 40a85640a2a..784b18bf20a 100644
--- a/tools/clang_format_hash/linux64/clang-format-linux64
+++ b/tools/clang_format_hash/linux64/clang-format-linux64
@@ -1 +1 @@
-21ca53c291a88b53dac85751b7a0203ca610ac94b7adaff3c092cf30df4168f2
\ No newline at end of file
+21ca53c291a88b53dac85751b7a0203ca610ac94b7adaff3c092cf30df4168f2
diff --git a/tools/clang_format_hash/mac/clang-format-mojave b/tools/clang_format_hash/mac/clang-format-mojave
index fe4f8f6bdd6..7e4dc1402cb 100644
--- a/tools/clang_format_hash/mac/clang-format-mojave
+++ b/tools/clang_format_hash/mac/clang-format-mojave
@@ -1 +1 @@
-5fde7bccf65032da297dfb1f18e4a95e96e278fa397e9dcaf364dfe23ec46353
\ No newline at end of file
+5fde7bccf65032da297dfb1f18e4a95e96e278fa397e9dcaf364dfe23ec46353
diff --git a/tools/test/test_trailing_newlines.py b/tools/test/test_trailing_newlines.py
new file mode 100644
index 00000000000..ff6c9e6780c
--- /dev/null
+++ b/tools/test/test_trailing_newlines.py
@@ -0,0 +1,49 @@
+from tools import trailing_newlines
+import unittest
+import tempfile
+
+
+def correct_trailing_newlines(file_contents: str) -> bool:
+    with tempfile.NamedTemporaryFile(mode='w', delete=False) as tmp:
+        filename = tmp.name
+        tmp.write(file_contents)
+    return trailing_newlines.correct_trailing_newlines(filename)
+
+
+class TestTrailingNewlines(unittest.TestCase):
+    def test_empty(self) -> None:
+        self.assertTrue(correct_trailing_newlines(''))
+
+    def test_single_byte(self) -> None:
+        self.assertFalse(correct_trailing_newlines('a'))
+
+    def test_single_newline(self) -> None:
+        self.assertFalse(correct_trailing_newlines('\n'))
+
+    def test_two_newlines(self) -> None:
+        self.assertFalse(correct_trailing_newlines('\n\n'))
+
+    def test_three_newlines(self) -> None:
+        self.assertFalse(correct_trailing_newlines('\n\n\n'))
+
+    def test_hello_world(self) -> None:
+        self.assertFalse(correct_trailing_newlines('hello world'))
+
+    def test_hello_world_newline(self) -> None:
+        self.assertTrue(correct_trailing_newlines('hello world\n'))
+
+    def test_hello_world_two_newlines(self) -> None:
+        self.assertFalse(correct_trailing_newlines('hello world\n\n'))
+
+    def test_hello_world_three_newlines(self) -> None:
+        self.assertFalse(correct_trailing_newlines('hello world\n\n\n'))
+
+    def test_hello_world_multiline(self) -> None:
+        self.assertFalse(correct_trailing_newlines('hello\nworld'))
+
+    def test_hello_world_multiline_gap(self) -> None:
+        self.assertTrue(correct_trailing_newlines('hello\n\nworld\n'))
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tools/trailing_newlines.py b/tools/trailing_newlines.py
new file mode 100755
index 00000000000..ee743a4785f
--- /dev/null
+++ b/tools/trailing_newlines.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+
+import fileinput
+import os
+import sys
+
+NEWLINE, = b'\n'
+
+
+def correct_trailing_newlines(filename: str) -> bool:
+    with open(filename, 'rb') as f:
+        a = len(f.read(2))
+        if a == 0:
+            return True
+        elif a == 1:
+            # file is wrong whether or not the only byte is a newline
+            return False
+        else:
+            f.seek(-2, os.SEEK_END)
+            b, c = f.read(2)
+            # no ASCII byte is part of any non-ASCII character in UTF-8
+            return b != NEWLINE and c == NEWLINE
+
+
+def main() -> int:
+    # mimic git grep exit code behavior
+    exit_code = 1
+    for line in fileinput.input():
+        stripped = line.rstrip()
+        if not correct_trailing_newlines(stripped):
+            exit_code = 0
+            print(stripped)
+    return exit_code
+
+
+if __name__ == '__main__':
+    sys.exit(main())
diff --git a/tools/update_disabled_tests.sh b/tools/update_disabled_tests.sh
index 1895aee1ece..58f562a1345 100755
--- a/tools/update_disabled_tests.sh
+++ b/tools/update_disabled_tests.sh
@@ -6,4 +6,4 @@ curl 'https://api.github.com/search/issues?q=is%3Aissue+is%3Aopen+label%3A%22top
 | sed 's/"score": [0-9\.]*/"score": 0.0/g' > result.json
 # score changes every request, so we strip it out to avoid creating a commit every time we query.
 git commit -a -m 'update'
-git push
\ No newline at end of file
+git push
diff --git a/torch/_C/_cudnn.pyi b/torch/_C/_cudnn.pyi
index 8fa020f5fa6..e6c7beb3168 100644
--- a/torch/_C/_cudnn.pyi
+++ b/torch/_C/_cudnn.pyi
@@ -14,4 +14,4 @@ class RNNMode(int, Enum):
     rnn_relu = ...
     rnn_tanh = ...
     lstm = ...
-    gru = ...
\ No newline at end of file
+    gru = ...
diff --git a/torch/_C/_functions.pyi b/torch/_C/_functions.pyi
index bbc6606722f..da2eb27b7cb 100644
--- a/torch/_C/_functions.pyi
+++ b/torch/_C/_functions.pyi
@@ -9,4 +9,4 @@ class UndefinedGrad:
 class DelayedError:
     def __init__(self, msg: AnyStr, num_inputs: int) -> None: ...
     def __call__(self, inputs: List[Tensor]) -> List[Tensor]: ...
-    ...
\ No newline at end of file
+    ...
diff --git a/torch/_C/_nn.pyi.in b/torch/_C/_nn.pyi.in
index f465b16cfbe..518fbac0a68 100644
--- a/torch/_C/_nn.pyi.in
+++ b/torch/_C/_nn.pyi.in
@@ -22,4 +22,4 @@ def _parse_to(dtype: _dtype, non_blocking: _bool, copy: _bool, *,
               memory_format: memory_format) -> Tuple[_device, _dtype, _bool, memory_format]: ...
 @overload
 def _parse_to(tensor: Tensor, non_blocking: _bool, copy: _bool, *,
-              memory_format: memory_format) -> Tuple[_device, _dtype, _bool, memory_format]: ...
\ No newline at end of file
+              memory_format: memory_format) -> Tuple[_device, _dtype, _bool, memory_format]: ...
diff --git a/torch/csrc/deploy/CMakeLists.txt b/torch/csrc/deploy/CMakeLists.txt
index 44aa11128c6..9f84cfa0b86 100644
--- a/torch/csrc/deploy/CMakeLists.txt
+++ b/torch/csrc/deploy/CMakeLists.txt
@@ -25,4 +25,3 @@ target_link_libraries(test_deploy PUBLIC gtest dl torch_deploy)
 add_executable(deploy_benchmark ${DEPLOY_DIR}/example/benchmark.cpp)
 target_include_directories(deploy_benchmark PRIVATE ${PYTORCH_ROOT}/torch)
 target_link_libraries(deploy_benchmark PUBLIC torch_deploy)
-
diff --git a/torch/csrc/jit/serialization/source_range_serialization_impl.h b/torch/csrc/jit/serialization/source_range_serialization_impl.h
index 17bf91551ed..7f6e4181394 100644
--- a/torch/csrc/jit/serialization/source_range_serialization_impl.h
+++ b/torch/csrc/jit/serialization/source_range_serialization_impl.h
@@ -26,4 +26,4 @@ class ConcreteSourceRangeUnpickler : public SourceRangeUnpickler {
 };
 
 } // namespace jit
-} // namespace torch
\ No newline at end of file
+} // namespace torch
diff --git a/torch/csrc/python_dimname.cpp b/torch/csrc/python_dimname.cpp
index 64407a6ee8d..09dbd7194b7 100644
--- a/torch/csrc/python_dimname.cpp
+++ b/torch/csrc/python_dimname.cpp
@@ -97,4 +97,3 @@ at::Dimname THPDimname_parse(PyObject* obj) {
   torch::kPyInternedStringToDimname.addMapping(obj, dimname);
   return dimname;
 }
-
diff --git a/torch/csrc/python_dimname.h b/torch/csrc/python_dimname.h
index 387eabf687a..2bca0f07344 100644
--- a/torch/csrc/python_dimname.h
+++ b/torch/csrc/python_dimname.h
@@ -5,4 +5,3 @@
 at::Dimname THPDimname_parse(PyObject* obj);
 bool THPUtils_checkDimname(PyObject* obj);
 bool THPUtils_checkDimnameList(PyObject* obj);
-
diff --git a/torch/csrc/python_headers.h b/torch/csrc/python_headers.h
index 2a64bdd5c6e..f255f56e9e0 100644
--- a/torch/csrc/python_headers.h
+++ b/torch/csrc/python_headers.h
@@ -16,4 +16,3 @@
 #if PY_MAJOR_VERSION < 3
 #error "Python 2 has reached end-of-life and is no longer supported by PyTorch."
 #endif
-
diff --git a/torch/deploy.h b/torch/deploy.h
index 8fa95d7c7ca..87338adaba1 100644
--- a/torch/deploy.h
+++ b/torch/deploy.h
@@ -1,3 +1,3 @@
 #pragma once
 
-#include <torch/csrc/deploy/deploy.h>
\ No newline at end of file
+#include <torch/csrc/deploy/deploy.h>
diff --git a/torch/optim/_multi_tensor/__init__.pyi b/torch/optim/_multi_tensor/__init__.pyi
index 952b969012b..1d1ec63c777 100644
--- a/torch/optim/_multi_tensor/__init__.pyi
+++ b/torch/optim/_multi_tensor/__init__.pyi
@@ -5,4 +5,4 @@ from .rmsprop import RMSprop as RMSprop
 from .rprop import Rprop as Rprop
 from .asgd import ASGD as ASGD
 from .adamax import Adamax as Adamax
-from .adadelta import Adadelta as Adadelta
\ No newline at end of file
+from .adadelta import Adadelta as Adadelta
diff --git a/torch/optim/_multi_tensor/adadelta.pyi b/torch/optim/_multi_tensor/adadelta.pyi
index 0ca4478a16d..37f93302024 100644
--- a/torch/optim/_multi_tensor/adadelta.pyi
+++ b/torch/optim/_multi_tensor/adadelta.pyi
@@ -2,4 +2,4 @@ from typing import Tuple
 from ..optimizer import _params_t, Optimizer
 
 class Adadelta(Optimizer):
-    def __init__(self, params: _params_t, lr: float=..., rho: float=..., eps: float=..., weight_decay: float=...) -> None: ...
\ No newline at end of file
+    def __init__(self, params: _params_t, lr: float=..., rho: float=..., eps: float=..., weight_decay: float=...) -> None: ...