Typo in description of Versioned.java

[Harshita]

I noticed a very minor typo in the description of Versioned.java. The description says "This class it bad to use in map" instead of "This class is bad to use in map"

If this is a welcome request, I would like to raise a PR to fix this issue.

Regards,
Harshita

[Siddharth Singh]

Thanks for catching that. Please raise a PR.

[David Ongaro]

A whole PR for a single character typo? There are a lot of typos I missed in #454, so why not fix some more on this occasion?