Add filename attr to SyntaxError type (#1126)

Author: jamesls

stdlib/2/__builtin__.pyi

@@ -920,6 +920,7 @@ class SyntaxError(StandardError):
     lineno = ...  # type: int
     offset = ...  # type: int
     text = ...  # type: str
+    filename = ...  # type: str
 class IndentationError(SyntaxError): ...
 class TabError(IndentationError): ...
 class SystemError(StandardError): ...

stdlib/3/builtins.pyi

@@ -956,6 +956,7 @@ class SyntaxError(Exception):
     lineno = ...  # type: int
     offset = ...  # type: int
     text = ...  # type: str
+    filename = ...  # type: str
 class IndentationError(SyntaxError): ...
 class TabError(IndentationError): ...
 class SystemError(Exception): ...