bug#3312: 23.0.93; Use punctuation syntax for apostrophe in Info

[Drew Adams]

> From: Juri Linkov Sent: Monday, May 18, 2009 5:48 PM
> >> Apostrophe, or single quote, (') currently has 
> >> word-constituent syntax in Info, which it inherits from text-mode.
> >>
> >> This means that if point is inside some `...'  string, and you use
> >> `C-s C-w', you will pick up also the ' at the end as part of the
> >> search string, which is typically not what you want.
> >
> > Yes, it might be a good idea to change it in Info-mode, 
> > which is quite different from text-mode because of the
> > extensive use of `...' and the fact that it's read-only.
> 
> This can be fixed with the following patch...

That's the same thing I sent in my original bug report:
(set-syntax-table
  (copy-syntax-table text-mode-syntax-table))
(modify-syntax-entry ?' ".")

except that you added a defvar for the table - not needed, but why not? So it's
OK by me.

Dunno whether Kevin's suggestion of doing the same for non-breaking space should
be adopted also: (modify-syntax-entry ?\240 ".")