Jay Soffian [off-list ref] writes:
In certain situations, commit authorship can consist of an invalid
e-mail address. For example, this is the case when working with git svn
repos where the author email has had the svn repo UUID appended such as:
author@example.com <author@example.com@deadbeef-dead-beef-dead-beefdeadbeef>
Given such an address, mailinfo extracts the authorship incorrectly as
it assumes a valid domain. However, when rebasing the original
authorship should be preserved irrespective of its validity as an email
address.
This justifies the motivation very well. Thanks.