bug#12067: 24.1; improper menu formatting with multiple \t chars

[Drew Adams]

> > It turns out that using only a single \t does the right 
> > thing in terms of alignment in this case.  But shouldn't
> > multiple \t's let you tab (indent) further, as they do
> > in text buffers, doc strings, etc.?  And
> > presumably \t\t should not draw a rectangle, in any case.
> 
> No. A menu is not a buffer.

No one said it is.