Documentation updates

[VitalyFedyunin]

Cherry-picks of:

Add docs about memory format (#34818)
Add docs to resize_ and resize_as_ (#35392)

[dr-ci]

💊 CircleCI build failures summary and remediations

As of commit 63bab81 (more details on the Dr. CI page):

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• 3/3 failures introduced in this PR

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🕵️ 3 new failures recognized by patterns

The following build failures do not appear to be due to upstream breakages (reran 3 jobs to discount flakiness):

pytorch_linux_xenial_py3_6_gcc5_4_test (1/3)

Step: "Test" (full log | pattern match details) <confirmed not flaky by 2 failures>

Mar 26 00:48:20 AssertionError: 12 not less than or equal to 1e-05 :

Mar 26 00:48:20 ---------------------------------------------------------------------- 
Mar 26 00:48:20 Traceback (most recent call last): 
Mar 26 00:48:20   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 175, in wrapper 
Mar 26 00:48:20     self._join_processes(fn) 
Mar 26 00:48:20   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 285, in _join_processes 
Mar 26 00:48:20     self._check_return_codes(elapsed_time) 
Mar 26 00:48:20   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 324, in _check_return_codes 
Mar 26 00:48:20     self.assertEqual(p.exitcode, first_process.exitcode) 
Mar 26 00:48:20   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_utils.py", line 915, in assertEqual 
Mar 26 00:48:20     super(TestCase, self).assertLessEqual(abs(x - y), prec, message) 
Mar 26 00:48:20 AssertionError: 12 not less than or equal to 1e-05 :  
Mar 26 00:48:20  
Mar 26 00:48:20 ---------------------------------------------------------------------- 
Mar 26 00:48:20 Ran 27 tests in 89.803s 
Mar 26 00:48:20  
Mar 26 00:48:20 FAILED (failures=1) 
Mar 26 00:48:20  
Mar 26 00:48:20 Generating XML reports... 
Mar 26 00:48:20 Traceback (most recent call last): 
Mar 26 00:48:20   File "test/run_test.py", line 674, in <module> 
Mar 26 00:48:20     main() 

pytorch_macos_10_13_py3_test (2/3)

Step: "Test" (full log | pattern match details) <confirmed not flaky by 2 failures>

Mar 25 18:06:22 AssertionError: 11 not less than or equal to 1e-05 :

Mar 25 18:06:22 ---------------------------------------------------------------------- 
Mar 25 18:06:22 Traceback (most recent call last): 
Mar 25 18:06:22   File "/Users/distiller/workspace/miniconda3/lib/python3.7/site-packages/torch/testing/_internal/common_distributed.py", line 175, in wrapper 
Mar 25 18:06:22     self._join_processes(fn) 
Mar 25 18:06:22   File "/Users/distiller/workspace/miniconda3/lib/python3.7/site-packages/torch/testing/_internal/common_distributed.py", line 285, in _join_processes 
Mar 25 18:06:22     self._check_return_codes(elapsed_time) 
Mar 25 18:06:22   File "/Users/distiller/workspace/miniconda3/lib/python3.7/site-packages/torch/testing/_internal/common_distributed.py", line 328, in _check_return_codes 
Mar 25 18:06:22     self.assertEqual(first_process.exitcode, 0) 
Mar 25 18:06:22   File "/Users/distiller/workspace/miniconda3/lib/python3.7/site-packages/torch/testing/_internal/common_utils.py", line 915, in assertEqual 
Mar 25 18:06:22     super(TestCase, self).assertLessEqual(abs(x - y), prec, message) 
Mar 25 18:06:22 AssertionError: 11 not less than or equal to 1e-05 :  
Mar 25 18:06:22  
Mar 25 18:06:22 ---------------------------------------------------------------------- 
Mar 25 18:06:22 Ran 27 tests in 35.299s 
Mar 25 18:06:22  
Mar 25 18:06:22 FAILED (failures=1) 
Mar 25 18:06:22  
Mar 25 18:06:22 Generating XML reports... 
Mar 25 18:06:22 Traceback (most recent call last): 
Mar 25 18:06:22   File "test/run_test.py", line 674, in <module> 
Mar 25 18:06:22     main() 

pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test (3/3)

Step: "Test" (full log | pattern match details) <confirmed not flaky by 2 failures>

Mar 26 01:31:37 AssertionError: 11 not less than or equal to 1e-05 :

Mar 26 01:31:37 ---------------------------------------------------------------------- 
Mar 26 01:31:37 Traceback (most recent call last): 
Mar 26 01:31:37   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 175, in wrapper 
Mar 26 01:31:37     self._join_processes(fn) 
Mar 26 01:31:37   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 285, in _join_processes 
Mar 26 01:31:37     self._check_return_codes(elapsed_time) 
Mar 26 01:31:37   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_distributed.py", line 328, in _check_return_codes 
Mar 26 01:31:37     self.assertEqual(first_process.exitcode, 0) 
Mar 26 01:31:37   File "/opt/conda/lib/python3.6/site-packages/torch/testing/_internal/common_utils.py", line 915, in assertEqual 
Mar 26 01:31:37     super(TestCase, self).assertLessEqual(abs(x - y), prec, message) 
Mar 26 01:31:37 AssertionError: 11 not less than or equal to 1e-05 :  
Mar 26 01:31:37  
Mar 26 01:31:37 ---------------------------------------------------------------------- 
Mar 26 01:31:37 Ran 27 tests in 20.854s 
Mar 26 01:31:37  
Mar 26 01:31:37 FAILED (failures=1) 
Mar 26 01:31:37  
Mar 26 01:31:37 Generating XML reports... 
Mar 26 01:31:37 Traceback (most recent call last): 
Mar 26 01:31:37   File "test/run_test.py", line 674, in <module> 
Mar 26 01:31:37     main() 

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This comment has been revised 4 times.