(Equality Predicates): Null strings are uniquified.

1 files changed, 8 insertions, 1 deletions

diff --git a/doc/lispref/objects.texi b/doc/lispref/objects.texi
index b4114a97d5d..0da05488858 100644
--- a/doc/lispref/objects.texi
+++ b/doc/lispref/objects.texi
@@ -1871,7 +1871,7 @@ This function returns a symbol naming the primitive type of
 @cindex equality
 
   Here we describe two functions that test for equality between any two
-objects.  Other functions test equality between objects of specific
+objects.  Other functions test equality of contents between objects of specific
 types, e.g., strings.  For these predicates, see the appropriate chapter
 describing the data type.
 
@@ -1905,6 +1905,13 @@ by the same change in the contents of the other.
 @end group
 
 @group
+(eq "" "")
+     @result{} t
+;; @r{This exception occurs because Emacs Lisp}
+;; @r{makes just one multibyte empty string, to save space.}
+@end group
+
+@group
 (eq '(1 (2 (3))) '(1 (2 (3))))
      @result{} nil
 @end group