(display-completion-list): Re-state the obsolescence of `common-substring'.

diff --git a/lisp/minibuffer.el b/lisp/minibuffer.el
index 6d7c331db87c3da78cbf5f93dce02334db849d29..35f0c107b2c69a52d80dd02dbc41486bf42686e7 100644 (file)
--- a/lisp/minibuffer.el
+++ b/lisp/minibuffer.el
@@ -826,7 +826,7 @@ properties of `highlight'.
 At the end, this runs the normal hook `completion-setup-hook'.
 It can find the completion buffer in `standard-output'.
 
-The optional arg COMMON-SUBSTRING, if non-nil, should be a string
+The obsolete optional arg COMMON-SUBSTRING, if non-nil, should be a string
 specifying a common substring for adding the faces
 `completions-first-difference' and `completions-common-part' to
 the completions buffer."