doc: give some guidelines for error messages

diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt
index 439545926ecdcf609c299ca0e5ea44032969c1be..a3c1fa332abb8d65051f6f6d5df6a14708fba980 100644 (file)
--- a/Documentation/git-merge.txt
+++ b/Documentation/git-merge.txt
@@ -10,7 +10,7 @@ SYNOPSIS
 --------
 [verse]
 'git merge' [-n] [--stat] [--no-commit] [--squash] [--[no-]edit]
-       [-s <strategy>] [-X <strategy-option>] [-S[<keyid>]]
+       [-s <strategy>] [-X <strategy-option>] [-S[<key-id>]]
        [--[no-]rerere-autoupdate] [-m <msg>] [<commit>...]
 'git merge' <msg> HEAD <commit>...
 'git merge' --abort