Fix test_semanal to ignore typing.py from output.

Author: davidfstr

TEST.py

@@ -0,0 +1,14 @@
+from mypy.typing import TypedDict
+Point = TypedDict('Point', {'x': int, 'y': int})
+point = dict(x=42, y=1337)  # type: Point
+
+
+"""
+from typing import TYPE_CHECKING
+if TYPE_CHECKING:
+    from typing import TypedDict
+else:
+    TypedDict = lambda name, fields: dict
+Point = TypedDict('Point', {'x': int, 'y': int})
+point = dict(x=42, y=1337)  # type: Point
+"""

mypy/test/testsemanal.py

@@ -78,6 +78,7 @@ def test_semanal(testcase):
             # TODO the test is not reliable
             if (not f.path.endswith((os.sep + 'builtins.pyi',
                                      'typing.pyi',
+                                     'typing.py',
                                      'abc.pyi',
                                      'collections.pyi'))
                     and not os.path.basename(f.path).startswith('_')