Fixed compatible mode in most runtime files.

runtime/ftplugin/python.vim

@@ -5,6 +5,8 @@
 
 if exists("b:did_ftplugin") | finish | endif
 let b:did_ftplugin = 1
+let s:keepcpo= &cpo
+set cpo&vim
 
 setlocal cinkeys-=0#
 setlocal indentkeys-=0#
@@ -41,3 +43,6 @@ if has("gui_win32") && !exists("b:browsefilter")
     let b:browsefilter = "Python Files (*.py)\t*.py\n" .
 		       \ "All Files (*.*)\t*.*\n"
 endif
+
+let &cpo = s:keepcpo
+unlet s:keepcpo