Add newline tests for #Filter

https://github.com/filemakerstandards/fmpstandards/issues/10
Modify #Filter to use Position/Middle and add trailing newline if missing

https://github.com/filemakerstandards/fmpstandards/issues/10
Disable ValueCount test for #.

We don't depend on ValueCount() giving correct results.  Instead,
we use PatternCount ( parameters ; Char ( 13 ) ), so that we do not
incorrectly count Char ( 10 ), Char ( 8232 ), or Char ( 8233 ).

https://github.com/filemakerstandards/fmpstandards/issues/10