for-each-ref: partly change <object> to <commit> in help

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 111e1be6f54f73f25ef6715a17410e461724519a..4d558937125fc4f099b4ada1d37f98259b2d73ba 100644 (file)
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -69,11 +69,13 @@ OPTIONS
 
 --merged [<object>]::
        Only list refs whose tips are reachable from the
-       specified commit (HEAD if not specified).
+       specified commit (HEAD if not specified),
+       incompatible with `--no-merged`.
 
 --no-merged [<object>]::
        Only list refs whose tips are not reachable from the
-       specified commit (HEAD if not specified).
+       specified commit (HEAD if not specified),
+       incompatible with `--merged`.
 
 --contains [<object>]::
        Only list refs which contain the specified commit (HEAD if not