fix for build using MINGW-10.0 with msys2

fix for build using MINGW-10.0 with msys2

remove some duplicate code

remove comment that no longer applies

better notification for value error

prnt0 and grnt0 need not be globals

add dictionary test for issue 414

identify code causing NSL to give no response

fix kevinlawler#353: trial implementation of print suppression

fix kevinlawler#402