bug#1848: 23.0.60; isearch-forward fails to find colon characters in Info buffers

[Stefan Monnier]

> Then the following patch does this.  It checks only for
> (eq search-invisible t), not for 'open.

Looks fine.

> BTW, I'm not sure if we should also skip the breadcrumbs line.
> I currently have no problems with the search matching at the
> breadcrumbs line.  So maybe we should wait for a request
> from someone who has a problem with breadcrumbs.

I see no reason to skip the breadcrumbs.


        Stefan