Use standard formatting where possible

Author: ilevkivskyi

mypy/build.py

@@ -921,12 +921,12 @@ def __init__(
             ):
                 continue
 
-            raise CompileError(
-                [
-                    f'mypy: error: "{os.path.relpath(path)}" shadows library module "{module}"',
-                    f'note: A user-defined top-level module with name "{module}" is not supported',
-                ]
+            self.errors.set_file(path, module, options)
+            self.error(None, f'This file shadows library module "{module}"', blocker=True)
+            self.note(
+                None, f'A user-defined top-level module with name "{module}" is not supported'
             )
+            self.errors.raise_error()
 
         if metastore is None:
             metastore = create_metastore(options, parallel_worker=parallel_worker)

test-data/unit/cmdline.test

@@ -1065,8 +1065,8 @@ except ValueError:
 from typing import *
 sys.path = path
 [out]
-mypy: error: "typing.py" shadows library module "typing"
-note: A user-defined top-level module with name "typing" is not supported
+typing.py: error: This file shadows library module "typing"
+typing.py: note: A user-defined top-level module with name "typing" is not supported
 == Return code: 2
 
 [case testCustomTypeshedDirWithRelativePathDoesNotCrash]

test-data/unit/pythoneval.test

@@ -1518,8 +1518,8 @@ async def foo() -> None:
 x = 0
 1 + ''
 [out]
-mypy: error: "tmp/typing.py" shadows library module "typing"
-note: A user-defined top-level module with name "typing" is not supported
+typing.py: error: This file shadows library module "typing"
+typing.py: note: A user-defined top-level module with name "typing" is not supported
 
 
 [case testNoPython3StubAvailable]