Fixed compatible mode in most runtime files.

runtime/syntax/perl6.vim

@@ -2,7 +2,7 @@
 " Language:     Perl 6
 " Maintainer:   Andy Lester <andy@petdance.com>
 " Homepage:     http://github.com/petdance/vim-perl/tree/master
-" Last Change:  2009-07-04
+" Last Change:  2012 Apr 30
 
 " Contributors: Luke Palmer <fibonaci@babylonia.flatirons.org>
 "               Moritz Lenz <moritz@faui2k3.org>
@@ -67,6 +67,8 @@ if version < 600
 elseif exists("b:current_syntax")
     finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 " identifiers
 syn match p6Normal display "\K\%(\k\|[-']\K\@=\)*"
@@ -2246,4 +2248,7 @@ setlocal foldmethod=syntax
 
 let b:current_syntax = "perl6"
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 " vim:ts=8:sts=4:sw=4:expandtab:ft=vim