Check for Fortran flag to accept long source code lines

This adds support for possibly long expansions of the preprocessor macro __FILE__.

requested review from @m214089

removed review request for @m214089

assigned to @m300488

That's perfectly fine with me! You can merge from my pint of view.

merged

mentioned in commit 0bd13659

mentioned in merge request !14 (closed)

mentioned in merge request !20 (merged)