SF Bug 667812: Some Linux distros have Alt and Meta reversed.

Lib/idlelib/config-keys.def

@@ -14,17 +14,17 @@ paste=<Control-Key-v>
 beginning-of-line= <Key-Home>
 center-insert=<Control-Key-l>
 close-all-windows=<Control-Key-q>
-close-window=<Alt-Key-F4>
+close-window=<Alt-Key-F4> <Meta-Key-F4>
 do-nothing=<Control-Key-F12>
 end-of-file=<Control-Key-d>
 python-docs=<Key-F1>
 python-context-help=<Shift-Key-F1> 
-history-next=<Alt-Key-n>
-history-previous=<Alt-Key-p>
+history-next=<Alt-Key-n> <Meta-Key-n>
+history-previous=<Alt-Key-p> <Meta-Key-p>
 interrupt-execution=<Control-Key-c>
 view-restart=<Key-F6>
-open-class-browser=<Alt-Key-c>
-open-module=<Alt-Key-m>
+open-class-browser=<Alt-Key-c> <Meta-Key-c>
+open-module=<Alt-Key-m> <Meta-Key-m>
 open-new-window=<Control-Key-n>
 open-window-from-file=<Control-Key-o>
 plain-newline-and-indent=<Control-Key-j>
@@ -39,21 +39,21 @@ toggle-auto-coloring=<Control-Key-slash>
 undo=<Control-Key-z>
 find=<Control-Key-f>
 find-again=<Control-Key-g> <Key-F3>
-find-in-files=<Alt-Key-F3>
+find-in-files=<Alt-Key-F3> <Meta-Key-F3>
 find-selection=<Control-Key-F3>
 replace=<Control-Key-h>
-goto-line=<Alt-Key-g>
+goto-line=<Alt-Key-g> <Meta-Key-g>
 smart-backspace=<Key-BackSpace>
 newline-and-indent=<Key-Return> <Key-KP_Enter>
 smart-indent=<Key-Tab>
 indent-region=<Control-Key-bracketright>
 dedent-region=<Control-Key-bracketleft>
-comment-region=<Alt-Key-3>
-uncomment-region=<Alt-Key-4>
-tabify-region=<Alt-Key-5>
-untabify-region=<Alt-Key-6>
-toggle-tabs=<Alt-Key-t>
-change-indentwidth=<Alt-Key-u>
+comment-region=<Alt-Key-3> <Meta-Key-3>
+uncomment-region=<Alt-Key-4> <Meta-Key-4>
+tabify-region=<Alt-Key-5> <Meta-Key-5>
+untabify-region=<Alt-Key-6> <Meta-Key-6>
+toggle-tabs=<Alt-Key-t> <Meta-Key-t>
+change-indentwidth=<Alt-Key-u> <Meta-Key-u>
 
 [IDLE Classic Unix]
 copy=<Alt-Key-w> <Meta-Key-w>