[cleanup] Use `"` instead of `'` for string literals

This is the more predominant style in the codebase. I'm sure there are
more in other parts of the codebase but it's hard to search/replace.

e2e_testing/main.py

@@ -34,37 +34,37 @@ from torch_mlir_e2e_test.test_suite import register_all_tests
 register_all_tests()
 
 def _get_argparse():
-    config_choices = ['native_torch', 'torchscript', 'linalg', 'mhlo', 'tosa', 'lazy_tensor_core', 'torchdynamo']
-    parser = argparse.ArgumentParser(description='Run torchscript e2e tests.')
-    parser.add_argument('-c', '--config',
+    config_choices = ["native_torch", "torchscript", "linalg", "mhlo", "tosa", "lazy_tensor_core", "torchdynamo"]
+    parser = argparse.ArgumentParser(description="Run torchscript e2e tests.")
+    parser.add_argument("-c", "--config",
         choices=config_choices,
-        default='linalg',
-        help=f'''
+        default="linalg",
+        help=f"""
 Meaning of options:
-"linalg": run through torch-mlir's default Linalg-on-Tensors backend.
-"mhlo": run through torch-mlir's default MHLO backend.
-"tosa": run through torch-mlir's default TOSA backend.
+"linalg": run through torch-mlir"s default Linalg-on-Tensors backend.
+"mhlo": run through torch-mlir"s default MHLO backend.
+"tosa": run through torch-mlir"s default TOSA backend.
 "native_torch": run the torch.nn.Module as-is without compiling (useful for verifying model is deterministic; ALL tests should pass in this configuration).
 "torchscript": compile the model to a torch.jit.ScriptModule, and then run that as-is (useful for verifying TorchScript is modeling the program correctly).
 "lazy_tensor_core": run the model through the Lazy Tensor Core frontend and execute the traced graph.
 "torchdynamo": run the model through the TorchDynamo frontend and execute the graph using Linalg-on-Tensors.
-''')
-    parser.add_argument('-f', '--filter', default='.*', help='''
+""")
+    parser.add_argument("-f", "--filter", default=".*", help="""
 Regular expression specifying which tests to include in this run.
-''')
-    parser.add_argument('-v', '--verbose',
+""")
+    parser.add_argument("-v", "--verbose",
                         default=False,
-                        action='store_true',
-                        help='report test results with additional detail')
-    parser.add_argument('-s', '--sequential',
+                        action="store_true",
+                        help="report test results with additional detail")
+    parser.add_argument("-s", "--sequential",
                         default=False,
-                        action='store_true',
-                        help='''Run tests sequentially rather than in parallel.
+                        action="store_true",
+                        help="""Run tests sequentially rather than in parallel.
 This can be useful for debugging, since it runs the tests in the same process,
-which make it easier to attach a debugger or get a stack trace.''')
-    parser.add_argument('--crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed',
-                        metavar="TEST", type=str, nargs='+',
-                        help='A set of tests to not attempt to run, since they crash and cannot be XFAILed.')
+which make it easier to attach a debugger or get a stack trace.""")
+    parser.add_argument("--crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed",
+                        metavar="TEST", type=str, nargs="+",
+                        help="A set of tests to not attempt to run, since they crash and cannot be XFAILed.")
     return parser
 
 def main():
@@ -74,25 +74,25 @@ def main():
         test.unique_name for test in GLOBAL_TEST_REGISTRY)
 
     # Find the selected config.
-    if args.config == 'linalg':
+    if args.config == "linalg":
         config = LinalgOnTensorsBackendTestConfig(RefBackendLinalgOnTensorsBackend())
         xfail_set = LINALG_XFAIL_SET
-    if args.config == 'tosa':
+    if args.config == "tosa":
         config = TosaBackendTestConfig(LinalgOnTensorsTosaBackend())
         xfail_set = all_test_unique_names - TOSA_PASS_SET
-    if args.config == 'mhlo':
+    if args.config == "mhlo":
         config = MhloBackendTestConfig(LinalgOnTensorsMhloBackend())
         xfail_set = all_test_unique_names - MHLO_PASS_SET
-    elif args.config == 'native_torch':
+    elif args.config == "native_torch":
         config = NativeTorchTestConfig()
         xfail_set = {}
-    elif args.config == 'torchscript':
+    elif args.config == "torchscript":
         config = TorchScriptTestConfig()
         xfail_set = {}
-    elif args.config == 'lazy_tensor_core':
+    elif args.config == "lazy_tensor_core":
         config = LazyTensorCoreTestConfig()
         xfail_set = LTC_XFAIL_SET
-    elif args.config == 'torchdynamo':
+    elif args.config == "torchdynamo":
         config = TorchDynamoTestConfig()
         xfail_set = TORCHDYNAMO_XFAIL_SET
 
@@ -101,7 +101,7 @@ def main():
     if args.crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed is not None:
         for arg in args.crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed:
             if arg not in all_test_unique_names:
-                print(f'ERROR: --crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed argument "{arg}" is not a valid test name')
+                print(f"ERROR: --crashing_tests_to_not_attempt_to_run_and_a_bug_is_filed argument '{arg}' is not a valid test name")
                 sys.exit(1)
 
     # Find the selected tests, and emit a diagnostic if none are found.
@@ -111,9 +111,9 @@ def main():
     ]
     if len(tests) == 0:
         print(
-            f'ERROR: the provided filter {args.filter!r} does not match any tests'
+            f"ERROR: the provided filter {args.filter!r} does not match any tests"
         )
-        print('The available tests are:')
+        print("The available tests are:")
         for test in available_tests:
             print(test.unique_name)
         sys.exit(1)
@@ -132,6 +132,6 @@ def _suppress_warnings():
     warnings.filterwarnings("ignore",
                             message="A builtin ctypes object gave a PEP3118 format string that does not match its itemsize")
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     _suppress_warnings()
     main()