bug#13219: 24.3.50; missing `...' in Emacs manual

[Drew Adams]

> Actually, the convention appears to be: enclose single keys 
> labels that are not single characters in angle brackets but
> quote single keys labels that are single characters (as well
> as labels of key sequences);

Yes, and that inconsistency is unnecessary.

My guess is that this double-standard convention was implemented/adopted due to
a misunderstanding of what " " means in key-sequence notation.

" " separates keys of the sequence, nothing more.  It never denotes the space
key, which `SPC' denotes in key sequence notation.

`f 1' means the key sequence of hitting the `f' key followed by hitting the `1'
key.

`f1' means the single-key key sequence of hitting the `f1' key (a function key).

`f SPC 1' means the key sequence of hitting `f' then `SPC then `1'.

There is no good reason to have introduced two kinds of quoting (angle brackets
and `...').  That is, there is no necessity for that.

Function keys and keys such as `ESC' `DEL' are unambiguously denoted using only
`...' syntax.  And it is not too late to get rid of the kludge - or at least
make it optional for those who are hooked on it.