Re: [BUG] org-link-search fails if search string contains new lines

[Matt Lundin <mdl@imapmail.org>]

Matt Lundin <mdl@imapmail.org> writes:

>
> Create an active region covering the third sentence and select the
> org-capture "n" template, which creates the following link:
>
> * Test
>  [[file:~/test.txt::Duis%20aute%20irure%20dolor%20in%0Areprehenderit%20in%20voluptate%20velit%20esse%20cillum%20dolore%20eu%20fugiat%20nulla%0Apariatur.]]
>
> Try to follow the link. It will open test.txt, but it will also give the
> message and fail to locate the correct position in the file:
>
>         "No match for fuzzy expression: Duis aute irure dolor in
>         reprehenderit in voluptate velit esse cillum dolore eu fugiat
>         nulla pariatur."
>

The problem, I think, is the regexp construction in org-link-search.
This was introduced back in August of 2015 with commit
cfe5bc97f8b18ccbf49d0764746c7563ce8d29da.

The problematic line in org.el is 10951:

(s-multi-re (mapconcat #'regexp-quote words "[ \t]+\\(?:\n[ \t]*\\)?"))

The constructed regexp fails because it assumes a newline will be
preceded by whitespace. But often newlines are not preceded by
whitespace.

Is there a reason the following won't work? 

(s-multi-re (mapconcat #'regexp-quote words "[ \t\r\n]+"))

This was the method org-link-search used prior to the commit above. Are
we trying to avoid matching across blank lines? 

Best,
Matt