(help-buffer): Add docstring.

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/help-mode.el b/lisp/help-mode.el
index d1e89705077..bbd1dfec131 100644
--- a/lisp/help-mode.el
+++ b/lisp/help-mode.el
@@ -358,6 +358,10 @@ restore it properly when going back."
 
 ;;;###autoload
 (defun help-buffer ()
+  "Return a buffer for inserting help.
+If `help-xref-following' is non-nil, this is the current buffer.
+Otherwise, it is the buffer named *Help*.  If no such buffer
+currently exists, it is created."
   (buffer-name                          ;for with-output-to-temp-buffer
    (if help-xref-following
        (current-buffer)