Document decode_as_string

Author: thecjharries

pygit2/config.py

@@ -323,4 +323,6 @@ def value_string(self):
 
     @staticmethod
     def decode_as_string(value):
+        """Returns ``value`` as a decoded ``utf-8`` string.
+        """
         return ffi.string(value).decode('utf-8')