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bug#16546: C-s vs. whitespace highlighting

From: martin rudalics
Subject: bug#16546: C-s vs. whitespace highlighting
Date: Mon, 27 Jan 2014 09:21:41 +0100

>> Yes, good idea.  I also think search for two whitespace chars in a row
>> should temporary toggle `search-whitespace-regexp' to nil.
> IMO, that behavior would make sense only when the whitespace chars are
> entered interactively (i.e. typed on the keyboard), because if the
> search string comes from another place (copy&paste, grabbed from the
> buffer, ...), I don't think it would be a good idea to temporarily set
> `search-whitespace-regexp' to nil.  And BTW, that reasoning applies
> equally to case-fold-search.
> IOW, if I copy some text "foo<any-whitespace>bar" from one place and
> then go to Emacs and do "C-s C-y", I definitely want a "lax" search
> wrt whitespace.
> At least, that behavior should be configurable, IMO.

Searching for two or more whitespace characters without any surrounding
non-whitespace characters should bind `search-whitespace-regexp' to nil.
This would trivially take care of Dan's original problem.  And it should
go into Emacs 24.4 because Dan's scenario reveals a very obvious bug.


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