The default summaries for a license are now computed in

LicenseInfo.get_summary(), and now state information such as the

number of days left in a trial or a grace period. The plan name is no

longer wrapped in parentheses by default, but License Providers can

override LicenseInfo.format_plan_name() to set this however they need.
The default summary-building makes use of strings stored in a map, which

helps keep the strings maintainable and avoids a bunch of nested logic.

This is purely internal as a helper.
There are a few other small fixes for typos and types, and

LicenseInfo.__repr__() has been added.

Unit tests pass.
Verified the different states on the Licenses page.
Made use of the summary in the Power Pack work.