key binding of `M-&' shows up in menu as (M-)

[Drew Adams]

emacs -Q

Bind a command `foo' in a minibuffer completion map to `M-&'.
Add `foo' to the Minibuf menu:
(define-key map [menu-bar minibuf foo] '(menu-item "Foo It" foo))

In the Minibuf menu, the item appears with the wrong binding:

 Foo It  (M-)

The `&' was removed - it should show "(M-&)".
Perhaps the `&' needs to be automatically escaped?


In GNU Emacs 22.1.50.1 (i386-mingw-nt5.1.2600)
 of 2007-05-22 on LENNART-69DE564
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/g/include'