Test GCC conversion with reposurgeon available

[Joseph Myers]

On Mon, 23 Dec 2019, Roman Zhuykov wrote:

> I've never used zhroma@gcc.gnu.org email in ChangeLog files. So, it seems odd
> that it is used in r270511 (my first commit as maintainer), but not in next

That's because that commit also edits ChangeLog entries from other 
authors.  When a commit adds / edits ChangeLog entries for more than one 
author (the difference between purely editing an existing entry and adding 
a new one, possibly under an existing date/author header, for a 
multi-author commit, is not something that can reliably be determined 
automatically), the conversion falls back to using the committer identity 
instead of picking one of the multiple relevant authors from the ChangeLog 
files.

-- 
Joseph S. Myers
jsm@polyomino.org.uk