Treewide remove unexpected 0xff

Note: you will not *see* them on GitHub's diff.

Remove ^L characters hidden randomly in the code. Not those used in text files as delimiters.  

While working on a tool that processes Erlang code and testing it against this repo,
I found out about those little sneaky 0xff. I thought it may be of help to other
people build such tools to remove non-conforming-to-standard characters.