bug#17702: 24.3; insert-char no longer inserts "bell" control character

[Stefan Monnier]

> That's because U+1F541 has "BELL" as its 'name' property, whereas
> u+0007 has "BELL" as its 'old-name' property.  Emacs completion picks
> only one from these 2 duplicate candidates.

It's not just a question of completion: u+0007 does not seem to have
a "name", and U+1F541 does not seem to have an "old-name", so the only
thing we don't have much to disambiguate the two, and given the "old-"
prefix, we prefer the char whose "name" matches.

I guess we could tweak the table such that u+0007 is provided under
a name like "BELL (old)", but C-x 8 RET BELL RET would still insert
U+1F541 since that's the char named "BELL".


        Stefan