doc/lispref/strings.texi (Text Comparison): Mention
equal-including-properties for when text properties of the strings
matter for comparison.
+2014-04-24 Eli Zaretskii <eliz@gnu.org>
+
+ * strings.texi (Text Comparison): Mention
+ equal-including-properties for when text properties of the strings
+ matter for comparison.
+
2014-04-21 Eli Zaretskii <eliz@gnu.org>
* text.texi (Registers): Document register-read-with-preview.
This function is equivalent to @code{equal} for comparing two strings
(@pxref{Equality Predicates}). In particular, the text properties of
-the two strings are ignored. But if either argument is not a string
-or symbol, an error is signaled.
+the two strings are ignored; use @code{equal-including-properties} if
+you need to distinguish between strings that differ only in their text
+properties. However, unlike @code{equal}, if either argument is not a
+string or symbol, @code{string=} signals an error.
@example
(string= "abc" "abc")