X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=Documentation%2Fgit-patch-id.txt;h=b6fa2a8b399adc80bfa9acbc02c7f5cf5fb88aa6;hb=ee6566e8d70da682ac4926dd8a67ac821b2c1743;hp=9a4abd124dfd0a6ceea058c3c4105298c81e8f5a;hpb=58eaf287f1b25f6427b06bd72d8e555615828aeb;p=git.git

diff --git a/Documentation/git-patch-id.txt b/Documentation/git-patch-id.txt
index 9a4abd12..b6fa2a8b 100644
--- a/Documentation/git-patch-id.txt
+++ b/Documentation/git-patch-id.txt
@@ -3,26 +3,25 @@ git-patch-id(1)
 
 NAME
 ----
-git-patch-id - Some git command not yet documented.
-
+git-patch-id - Generate a patch ID.
 
 SYNOPSIS
 --------
-'git-patch-id' [ --option ] <args>...
+'git-patch-id' < <patch>
 
 DESCRIPTION
 -----------
-Does something not yet documented.
+A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
+whitespace and line numbers ignored.  As such, it's "reasonably stable", but at
+the same time also reasonably unique, ie two patches that have the same "patch
+ID" are almost guaranteed to be the same thing.
 
+IOW, you can use this thing to look for likely duplicate commits.
 
 OPTIONS
 -------
---option::
-	Some option not yet documented.
-
-<args>...::
-	Some argument not yet documented.
-
+<patch>::
+	The diff to create the ID of.
 
 Author
 ------