bug#13480: 24.3.50; `C-w' from Isearch should translate newlines to spaces

[Dani Moncayo <dmoncayo@gmail.com>]

Hello,

I have `isearch-lax-whitespace' set to t in my init file, so that I
can search for a sequence of words regardless of whether there is line
breaks or plain spaces between them.

Now, if the text following point is "foo bar" and I do `C-s C-w C-w'
I'll be searching for any sequence of those two words, separated by
any whitespace (well, controlled by `search-whitespace-regexp').  Ok,
as expected.

But I've just noticed that if the text following point is
"foo<newline>bar" and I do the same, I'll be searching exactly for
that fixed sequence of 7 characters, including the <newline>.  Not
what I want, obviously.

So I propose that the command `isearch-yank-word-or-char' (C-w in
Isearch) DTRT in this case, i.e., when `search-whitespace-regexp' is
non-nil, translate the <newline> into a simple space when pulling text
from the buffer into the search string.

TIA.

In GNU Emacs 24.3.50.1 (i386-mingw-nt6.2.9200)
 of 2013-01-10 on MS-W8-DANI
Bzr revision: 111476 jan.h.d@swipnet.se-20130110174508-0pdaxa5ys9me698g
Windowing system distributor `Microsoft Corp.', version 6.2.9200
Configured using:
 `configure --with-gcc (4.7) --no-opt --enable-checking --cflags
 -Ic:/emacs/libs/libXpm-3.5.10/include -Ic:/emacs/libs/libXpm-3.5.10/src
 -Ic:/emacs/libs/libpng-dev_1.4.3-1_win32/include
 -Ic:/emacs/libs/zlib-dev_1.2.5-2_win32/include
 -Ic:/emacs/libs/giflib-4.1.4-1-lib/include
 -Ic:/emacs/libs/jpeg-6b-4-lib/include
 -Ic:/emacs/libs/tiff-3.8.2-1-lib/include
 -Ic:/emacs/libs/libxml2-2.7.8-w32-bin/include/libxml2
 -Ic:/emacs/libs/gnutls-3.1.5-w32/include
 -Ic:/emacs/libs/libiconv-1.14-2-mingw32-dev/include'

-- 
Dani Moncayo