commit <sha1>
Author: <author>
- Date: <date>
+ Date: <author date>
<title line>
commit <sha1>
Author: <author>
- AuthorDate: <date & time>
+ AuthorDate: <author date>
Commit: <committer>
- CommitDate: <date & time>
+ CommitDate: <committer date>
<title line>
From <sha1> <date>
From: <author>
- Date: <date & time>
+ Date: <author date>
Subject: [PATCH] <title line>
<full commit message>