Improve indexing of function doc string conventions

* doc/lispref/functions.texi (Function Documentation): Improve
indexing (bug#38158).

diff --git a/doc/lispref/functions.texi b/doc/lispref/functions.texi
index 12112508b01c4818e151e3ea9066f6800479d9e6..6157f9a535bc93b4389d3eb5f8aa6f62fc42df89 100644 (file)
--- a/doc/lispref/functions.texi
+++ b/doc/lispref/functions.texi
@@ -453,7 +453,8 @@ after a @code{&rest} argument.
 
 @node Function Documentation
 @subsection Documentation Strings of Functions
-@cindex documentation of function
+@cindex documentation string of function
+@cindex function's documentation string
 
   A lambda expression may optionally have a @dfn{documentation string}
 just after the lambda list.  This string does not affect execution of