diff -r 5adf995d443f Doc/reference/expressions.rst
--- a/Doc/reference/expressions.rst	Mon Jul 06 14:03:01 2015 +0300
+++ b/Doc/reference/expressions.rst	Mon Jul 13 01:16:19 2015 +0300
@@ -649,16 +649,26 @@
 
 .. productionlist::
    call: `primary` "(" [`argument_list` [","] | `comprehension`] ")"
-   argument_list: `positional_arguments` ["," `keyword_arguments`]
-                :   ["," "*" `expression`] ["," `keyword_arguments`]
-                :   ["," "**" `expression`]
-                : | `keyword_arguments` ["," "*" `expression`]
-                :   ["," `keyword_arguments`] ["," "**" `expression`]
-                : | "*" `expression` ["," `keyword_arguments`] ["," "**" `expression`]
-                : | "**" `expression`
-   positional_arguments: `expression` ("," `expression`)*
-   keyword_arguments: `keyword_item` ("," `keyword_item`)*
-   keyword_item: `identifier` "=" `expression`
+   argument_list: (`positional_argument` | `starred_argument`)*
+                :   ("," `keyword_argument` | `starred_argument`)*
+                :   ("," `keyword_argument` | `starred_keyword_argument`)*
+   positional_argument: `expression`
+   starred_argument: "*" `expression`
+   keyword_argument: `identifier` "=" `expression`
+   starred_keyword_argument: "**" `expression`
+
+.. versionchanged:: 3.5
+   Function calls accept any number of ``*`` and ``**`` unpackings.
+
+   Keyword arguments must follow positional arguments, and ``**`` unpackings must follow ``*`` unpackings::
+
+      function(
+         argument or *args, argument or *args, ...,
+         kwargument or *args, kwargument or *args, ...,
+         kwargument or **kwargs, kwargument or **kwargs, ...
+      )
+
+   See :pep:`448` for more details about unpacking generalizations.
 
 An optional trailing comma may be present after the positional and keyword arguments
 but does not affect the semantics.