Item11267: Don't perltidy everything

The exit was not checking whether tidyOptions was undef. Also added a
message to show what is going on.

Also tidy and report all files that fail.  Don't fail on the first one.

git-svn-id: http://svn.foswiki.org/trunk@17380 0b4bb1d4-4e5a-0410-9cc4-b2b747904278