`dfsg-version-with-period`

The version contains the string .dfsg. That versioning may harbor a subtle sorting issue, namely: 1.2.dfsg1 is a more recent version than 1.2.1. It will therefore be difficult to find a nice version string for the next upstream release if it gains another dotted digit at the end.

It is better to use +dfsg instead. The plus sign + sorts before ., so the sorting that is usually desired can take place:

1.2 < 1.2+dfsg < 1.2.1