[This is preliminary documentation and is subject to change.]
Returns an appropriate version ID for diagnostic purposes, which must not be null.
This doesn't have any specific format; it's solely for diagnostic purposes.
The included sources return strings of the format "source identifier: source version" indicating where the
information comes from and which version of the source information has been loaded.

Assembly: NodaTime (Module: NodaTime.dll) Version: 1.2.0.0 (1.2.0)