[pygobject] Copy __doc__ when wrapping function

[Martin Pitt <martinpitt src gnome org>]

commit afa42ab95327da1de0cf86005974cd8ab0d46872
Author: Vratislav Podzimek <vpodzime redhat com>
Date:   Wed Sep 4 14:17:31 2013 +0200

    Copy __doc__ when wrapping function
    
    Signed-off-by: Vratislav Podzimek <vpodzime redhat com>
    Signed-off-by: Martin Pitt <martinpitt gnome org>

 gi/overrides/__init__.py |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gi/overrides/__init__.py b/gi/overrides/__init__.py
index 943ea60..8aa9731 100644
--- a/gi/overrides/__init__.py
+++ b/gi/overrides/__init__.py
@@ -64,6 +64,7 @@ class overridefunc(object):
         def wrapper(*args, **kwargs):
             return func(*args, **kwargs)
         wrapper.__name__ = func.__name__
+        wrapper.__doc__ = func.__doc__
         setattr(self.module, func.__name__, wrapper)
         return wrapper