Add "->" as a delimiter token. Found by James Harding on docs@.

birkenfeld · birkenfeld · commit 97f962339f01 · 2013-10-08T21:28:22.000+02:00
diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst
@@ -704,7 +704,7 @@ Delimiters
 The following tokens serve as delimiters in the grammar::
 
    (       )       [       ]       {       }
-   ,       :       .       ;       @       =
+   ,       :       .       ;       @       =       ->
    +=      -=      *=      /=      //=     %=
    &=      |=      ^=      >>=     <<=     **=
 
