[PATCH 3/3] Documentation: tweak git diff help slightly

["Chris Torek via GitGitGadget" <gitgitgadget@gmail.com>]

From: Chris Torek <chris.torek@gmail.com>

Update the manual page synopsis to include the two and three
dot notation.

Make "git diff -h" print the same usage summary as the manual
page synopsis.

Signed-off-by: Chris Torek <chris.torek@gmail.com>
---
 Documentation/git-diff.txt | 2 ++
 builtin/diff.c             | 9 ++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-diff.txt b/Documentation/git-diff.txt
index 37781cf1755..c6a201abd72 100644
--- a/Documentation/git-diff.txt
+++ b/Documentation/git-diff.txt
@@ -12,6 +12,8 @@ SYNOPSIS
 'git diff' [<options>] [<commit>] [--] [<path>...]
 'git diff' [<options>] --cached [<commit>] [--] [<path>...]
 'git diff' [<options>] <commit> <commit> [--] [<path>...]
+'git diff' [<options>] <commit>..<commit> [--] [<path>...]
+'git diff' [<options>] <commit>...<commit> [--] [<path>...]
 'git diff' [<options>] <blob> <blob>
 'git diff' [<options>] --no-index [--] <path> <path>
 
diff --git a/builtin/diff.c b/builtin/diff.c
index 8b8b95ec97e..365f9e9a908 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -24,7 +24,14 @@
 #define DIFF_NO_INDEX_IMPLICIT 2
 
 static const char builtin_diff_usage[] =
-"git diff [<options>] [<commit> [<commit>]] [--] [<path>...]";
+"git diff [<options>] [<commit>] [--] [<path>...]\n"
+"   or: git diff [<options>] --cached [<commit>] [--] [<path>...]\n"
+"   or: git diff [<options>] <commit> <commit>] [--] [<path>...]\n"
+"   or: git diff [<options>] <commit>..<commit>] [--] [<path>...]\n"
+"   or: git diff [<options>] <commit>...<commit>] [--] [<path>...]\n"
+"   or: git diff [<options>] <blob> <blob>]\n"
+"   or: git diff [<options>] --no-index [--] <path> <path>]\n"
+COMMON_DIFF_OPTIONS_HELP;
 
 static const char *blob_path(struct object_array_entry *entry)
 {
-- 
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