(split-string-and-unquote (combine-and-quote-strings STRINGS)) fails on trivial case

[Joe Wells]

The documentation strings for both split-string-and-unquote and
combine-and-quote-strings state that they attempt to achieve this
property:

  (split-string-and-unquote (combine-and-quote-strings strs)) == strs

Here is a trivial case that they fail on; the following sexp wrongly
evaluates to nil:

  (let ((l '("a b" "c")))
    (equal l
           (split-string-and-unquote (combine-and-quote-strings l))))

I hope this problem report is helpful.

Joe

======================================================================
In GNU Emacs 22.2.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
 of 2008-04-01 on artemis
Windowing system distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure  '--prefix=/home/jbw/local4' '--enable-debug' 
'--disable-nls' '--with-x-toolkit=gtk' 'CFLAGS=-O0 -g3 -ggdb -fno-crossjumping 
-DGLYPH_DEBUG=1''

Important settings:
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