branch: fix segfault when resolving an invalid HEAD

diff --git a/Documentation/git-mktag.txt b/Documentation/git-mktag.txt
index 320f5a1efb3ecd8443e01da714bdb6470d85838c..2860a3d1ba54c712bb30febfa37693f3efbdb7bf 100644 (file)
--- a/Documentation/git-mktag.txt
+++ b/Documentation/git-mktag.txt
@@ -1,6 +1,5 @@
 git-mktag(1)
 ============
-v0.1, May 2005
 
 NAME
 ----
@@ -9,12 +8,29 @@ git-mktag - Creates a tag object
 
 SYNOPSIS
 --------
-'git-mktag'
+'git-mktag' < signature_file
 
 DESCRIPTION
 -----------
-Reads a tag contents from its standard input and creates a tag object.
-The input must be a well formed tag object.
+Reads a tag contents on standard input and creates a tag object
+that can also be used to sign other objects.
+
+The output is the new tag's <object> identifier.
+
+Tag Format
+----------
+A tag signature file has a very simple fixed format: three lines of
+
+  object <sha1>
+  type <typename>
+  tag <tagname>
+
+followed by some 'optional' free-form signature that git itself
+doesn't care about, but that can be verified with gpg or similar.
+
+The size of the full object is artificially limited to 8kB.  (Just
+because I'm a lazy bastard, and if you can't fit a signature in that
+size, you're doing something wrong)
 
 
 Author
@@ -27,5 +43,5 @@ Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel
 
 GIT
 ---
-Part of the link:git.html[git] suite
+Part of the gitlink:git[7] suite