diff options
| -rw-r--r-- | doc/lispref/ChangeLog | 4 | ||||
| -rw-r--r-- | doc/lispref/strings.texi | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/doc/lispref/ChangeLog b/doc/lispref/ChangeLog index 282fa19bfa1..5f52b30d60a 100644 --- a/doc/lispref/ChangeLog +++ b/doc/lispref/ChangeLog @@ -1,3 +1,7 @@ +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. diff --git a/doc/lispref/strings.texi b/doc/lispref/strings.texi index b2f32ad02d6..f119b3ab84b 100644 --- a/doc/lispref/strings.texi +++ b/doc/lispref/strings.texi @@ -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 |