Re: document -- and @code @findex and `` and ---

[Karl Berry]

Hi Eli,

    that there's no index entry leading to this.  Something like

There were several, actually, among them "Dashes, in source" and
"Hyphen, in source".  Missing the main point of "multiple", though, I
agree.  I rearranged/rewrote things, so that now we have:

@cindex Multiple dashes in source
@cindex Dashes in source
@cindex Hyphens in source, two or three in a row
@cindex Em dash, producing
@cindex En dash, producing

Thanks for the suggestion.