cleaning up lint errors + tiny changes

Hi Josh, just a bit of cleanup for the new version of puppet-lint. If you want to merge, cool. If you don't, also cool.

For the CHANGELOG.md, that looks autogenerated by something. If so, I don't know by what. I did some googling but came up empty (there were some node.js things but they didn't look right).

Have a good day.

-Shawn
I'm not too keen on striping the trailing white space here as it was in the package supplied mcelog.conf and will inflate the size of the diff the first time the module is run.  Not a very strong feeling - I open to being pursuded.