Commit 2c3a09b1 authored by Richard M. Stallman's avatar Richard M. Stallman

(Creating Strings): Null strings from concat not unique.

parent 9a56b440
2007-10-31 Richard Stallman <rms@gnu.org>
* strings.texi (Creating Strings): Null strings from concat not unique.
2007-10-26 Richard Stallman <rms@gnu.org>
* objects.texi (Equality Predicates): Null strings are uniquified.
......
......@@ -259,7 +259,8 @@ returns an empty string.
@noindent
The @code{concat} function always constructs a new string that is
not @code{eq} to any existing string.
not @code{eq} to any existing string, except when the result is empty
(since empty strings are canonicalized to save space).
In Emacs versions before 21, when an argument was an integer (not a
sequence of integers), it was converted to a string of digits making up
......
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