commit <sha1>
Author: <author>
- Date: <author date>
+ Date: <author date>
<title line>
* 'fuller'
commit <sha1>
- Author: <author>
+ Author: <author>
AuthorDate: <author date>
- Commit: <committer>
+ Commit: <committer>
CommitDate: <committer date>
<title line>