Fix type check error
Fix type check error
Fix type check error
Fix duplicate __pos__ methods in 2.7 builtins stubs
Use staticmethod for dict.fromkeys to work around bug
Fix test case on Python 3.2
Fix annotation problem in tempfile
Fix type check problem in shutil
Fix type check error
Fix type check error
Fix invalid type annotation
Merge branch 'master' into type-system-features
Fix bytes/bytearray comparison test case
Refactor std lib posixpath to pass type checking