ref-filter: make %(upstream:track) prints "[gone]" for invalid upstreams

diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index d7ab4c9611760fe4059a7f58c2b09daf42a1c34d..94c6b88faa971ab97478a8b78b3cd00a2be4a1fd 100644 (file)
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -121,7 +121,8 @@ upstream::
        "[ahead N, behind M]" and `:trackshort` to show the terse
        version: ">" (ahead), "<" (behind), "<>" (ahead and behind),
        or "=" (in sync).  Has no effect if the ref does not have
-       tracking information associated with it.
+       tracking information associated with it. `:track` also prints
+       "[gone]" whenever unknown upstream ref is encountered.
 
 push::
        The name of a local ref which represents the `@{push}` location