Added SimpleCookie.value_encode/value_decode docs

Author: idomic

Lib/http/cookies.py

@@ -605,8 +605,16 @@ class SimpleCookie(BaseCookie):
     received from HTTP are kept as strings.
     """
     def value_decode(self, val):
+        """
+        Return an unquoted string, from the cookie header in a reversed fasion of value_encode.
+        """
+
         return _unquote(val), val
 
     def value_encode(self, val):
+        """
+        Return an escaped quoted string, if needed, for the cookie header usage.
+        Will include non-compliant characters in the cookie value if exist.
+        """
         strval = str(val)
         return strval, _quote(strval)