Refactored a variety of variable type functions.

Corrected all outstanding glaring issues in boolean functions. Defined
:define_function_to_report_bool() for conditionally defining functions to
unconditionally report either boolean true or false. Optimized
@{*-core/*-test/*-os} to call such function, dramatically reducing the length of
such parcel. Shifted @{var/file} into @{path/file/text/write}, as sensibility
demands. Various other revisions abound.