bug#10542: 24.0.92; `Search' field in Customize

[Drew Adams]

This search field is unlike any search field a user has seen before (at
least this user): whitespace, particularly whitespace at the field
beginning and end, is significant (searched for).
 
While this is no doubt a feature (this is not indexed, full-text search,
after all), it is not obvious to users.
 
At the very least, the :help mouseover text should make this very clear.
 
It might also help to display double quotes around the field - quotes
that are not searched for.  Dunno though - that too could be confusing
if a user searches for a string that starts with a double-quote etc.
 
But something definitely needs to be done.  It is all to easy to click
the mouse somewhere in the middle or at the end of the search field,
type a word/symbol, and click `Search', only to see "No matches".
 
The only way a user is likely to figure out what's happening is to (a)
figure out what function is invoked by the `Search' button and (b) debug
that function, to see what's going on.
 

In GNU Emacs 24.0.92.1 (i386-mingw-nt5.1.2600) of 2012-01-16 on MARVIN
 Windowing system distributor `Microsoft Corp.', version 5.1.2600
 configured using `configure --with-gcc (4.6) --no-opt --cflags
 -ID:/devel/emacs/libs/libXpm-3.5.8/include
 -ID:/devel/emacs/libs/libXpm-3.5.8/src
 -ID:/devel/emacs/libs/libpng-dev_1.4.3-1/include
 -ID:/devel/emacs/libs/zlib-dev_1.2.5-2/include
 -ID:/devel/emacs/libs/giflib-4.1.4-1/include
 -ID:/devel/emacs/libs/jpeg-6b-4/include
 -ID:/devel/emacs/libs/tiff-3.8.2-1/include
 -ID:/devel/emacs/libs/gnutls-3.0.9/include --ldflags
 -LD:/devel/emacs/libs/gnutls-3.0.9/lib'