Show usage string for 'git show-ref -h'

diff --git a/Documentation/merge-config.txt b/Documentation/merge-config.txt
index 1ff08ff2ccc6e56542f49713867698b66dab673f..c0f96e70708cab74a13ec8696db003289f99b455 100644 (file)
--- a/Documentation/merge-config.txt
+++ b/Documentation/merge-config.txt
@@ -22,7 +22,8 @@ merge.stat::
 merge.tool::
        Controls which merge resolution program is used by
        linkgit:git-mergetool[1].  Valid built-in values are: "kdiff3",
-       "tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and
+       "tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff",
+       "diffuse", "ecmerge", "tortoisemerge", "araxis", and
        "opendiff".  Any other value is treated is custom merge tool
        and there must be a corresponding mergetool.<tool>.cmd option.