Part of #156. Another batch of improvements from wrapping helper/assertion function implementations with set "$DISABLE_BATS_SHELL_OPTIONS" and restore_bats_shell_options.
Coverage increased (+0.01%) to 95.318% when pulling f9511d3229766027095909cfc709133cae448d5e on bats-function into 6cc7c959a17a08173ac88b26d3f222f38b616f1f on master.
Part of #156. Another batch of improvements from wrapping helper/assertion function implementations with
set "$DISABLE_BATS_SHELL_OPTIONS"
andrestore_bats_shell_options
.