(Imenu): Mention imenu-create-index-function's default value.

Explain submenus better.

diff --git a/lispref/modes.texi b/lispref/modes.texi
index e5e94e07ae5c4df49ec4ce7899b47162eb2ee039..6a1eddca0c4a8f873c2a63d41a4e3ebd9aed9222 100644 (file)
--- a/lispref/modes.texi
+++ b/lispref/modes.texi
@@ -1857,13 +1857,14 @@ Selecting a special element performs:
 A nested sub-alist element looks like this:
 
 @example
-(@var{index-name} @var{sub-alist})
+(@var{menu-title} @var{sub-alist})
 @end example
 
-It creates a submenu specified by @var{sub-alist}.
+It creates the submenu @var{menu-title} specified by @var{sub-alist}.
 
-The default value of @code{imenu-create-index-function} is a function
-that uses @code{imenu-prev-index-position-function} and
+The default value of @code{imenu-create-index-function} is
+@code{imenu-default-create-index-function}.  This function uses
+@code{imenu-prev-index-position-function} and
 @code{imenu-extract-index-name-function} to produce the index alist.
 However, if either of these two variables is @code{nil}, the default
 function uses @code{imenu-generic-expression} instead.