add (overwrite with) mypy stubs, if available

stdlib/3/pprint.pyi

@@ -0,0 +1,23 @@
+# Stubs for pprint
+
+# Based on http://docs.python.org/3.2/library/pprint.html
+
+from typing import Any, Dict, Tuple, TextIO
+
+def pformat(o: object, indent: int = 1, width: int = 80,
+            depth: int = None) -> str: ...
+def pprint(o: object, stream: TextIO = None, indent: int = 1, width: int = 80,
+           depth: int = None) -> None: ...
+def isreadable(o: object) -> bool: ...
+def isrecursive(o: object) -> bool: ...
+def saferepr(o: object) -> str: ...
+
+class PrettyPrinter:
+    def __init__(self, indent: int = 1, width: int = 80, depth: int = None,
+                 stream: TextIO = None) -> None: ...
+    def pformat(self, o: object) -> str: ...
+    def pprint(self, o: object) -> None: ...
+    def isreadable(self, o: object) -> bool: ...
+    def isrecursive(self, o: object) -> bool: ...
+    def format(self, o: object, context: Dict[int, Any], maxlevels: int,
+               level: int) -> Tuple[str, bool, bool]: ...