doc txt & -h consistency: make "diff-tree" consistent

Make the "diff-tree -h" output consistent with the *.txt version.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

builtin/diff-tree.c

@@ -83,8 +83,9 @@ static int diff_tree_stdin(char *line)
 }
 
 static const char diff_tree_usage[] =
-"git diff-tree [--stdin] [-m] [-c | --cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
-"[<common-diff-options>] <tree-ish> [<tree-ish>] [<path>...]\n"
+"git diff-tree [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]\n"
+"              [-t] [-r] [-c | --cc] [--combined-all-paths] [--root] [--merge-base]\n"
+"              [<common-diff-options>] <tree-ish> [<tree-ish>] [<path>...]\n"
 "\n"
 "  -r            diff recursively\n"
 "  -c            show combined diff for merge commits\n"