[PATCH] git-tag(1): we tag HEAD by default

[Thomas Rast <trast@inf.ethz.ch>]

The <commit>|<object> argument is actually not explained anywhere
(except implicitly in the description of an unannotated tag).  Write a
little explanation, in particular to cover the default.

Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
---

Prompted by a question on IRC about the default value.  Do we actually
read our own docs? ;-)

 Documentation/git-tag.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index e3032c4..697df50 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -126,6 +126,11 @@ This option is only applicable when listing tags without annotation lines.
 	linkgit:git-check-ref-format[1].  Some of these checks
 	may restrict the characters allowed in a tag name.
 
+<commit>, <object>::
+	The object that the new tag will refer to, usually a commit.
+	Defaults to HEAD.
+
+
 CONFIGURATION
 -------------
 By default, 'git tag' in sign-with-default mode (-s) will use your
-- 
1.8.2.548.g7173465