Change prefix for _importlib_modulespec names

Author: pkch

stdlib/3/_importlib_modulespec.pyi

@@ -9,6 +9,8 @@ from abc import ABCMeta
 import sys
 from typing import Any, Optional
 
+MYPY_MODULE = 'importlib.machinery'
+
 if sys.version_info >= (3, 4):
     class ModuleSpec:
         def __init__(self, name: str, loader: Optional['Loader'], *,
@@ -23,6 +25,8 @@ if sys.version_info >= (3, 4):
         parent = ...  # type: Optional[str]
         has_location = ...  # type: bool
 
+MYPY_MODULE = 'types'
+
 class ModuleType:
     __name__ = ...  # type: str
     __file__ = ...  # type: str
@@ -32,6 +36,8 @@ class ModuleType:
         __spec__ = ...  # type: Optional[ModuleSpec]
     def __init__(self, name: str, doc: Optional[str] = ...) -> None: ...
 
+MYPY_MODULE = 'importlib.abc'
+
 class Loader(metaclass=ABCMeta):
     def load_module(self, fullname: str) -> ModuleType: ...
     if sys.version_info >= (3, 3):