Update: White space function changes.

Update: White space function changes.

Make the is white space functions accept "strict" to be more consistent with how other functions operation.
For the next development release I want to consider separate functions to avoid passing a boolean as a parameter to do this (for performance reasons).

This changes behavior in some cases and if I did something wrong then there will be a regression.
Look out for white space regressions specifically in the FSS programs.