bug#22043: 25.0.50; search-forward and char folding

[Eli Zaretskii]

> Cc: Eli Zaretskii <eliz@gnu.org>, Mike Kupfer <m.kupfer@acm.org>,
>  Drew Adams <drew.adams@oracle.com>
> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
> Date: Tue, 1 Dec 2015 08:37:18 +0100
> 
> AFAIU it should go out there completely, being moved into a later section, 
> where the refining stuff resides.

It is explained in a section dedicated to "lax search", where other
kinds of non-literal matching are described.  I think that bringing
this stuff together in a single section makes it easier to describe,
as the features are similar with similar toggles.

> Understand char-folding as a special form of regexp-search.

This is the current implementation.  But a user manual should not be
driven by implementation, it should be driven by user-level POV, where
features can be similar even though their implementations are very
different.

> IMO it isn't worth to give it a such prominent focus and distracting from 
> more important stuff.

It doesn't get any prominent focus.  Please take a look at the manual:
this is described only _after_ we've covered incremental and
non-incremental search, word search, symbol search, and regexp
search.  It's actually quite close to the end of the chapter, just
before we describe replace commands.

> And it should be off by default.

This is not really relevant to documentation, which is the subject of
this bug report.