Add ruby version constants and basic spec
Force RSpec to shame me if I use should syntax
Hide my shame
Add private method testing and stream capture for STDIN, STDOUT, and STDERR
Add Menu#get_choices_from_list with tests
Fix prompt display
Catch out of range responses
Catch the case where a labeled choice is the default
Don’t label dont_know as default; simplify and disambiguate
Add show_result option to #get_choice_from_list
Refactor to use #get_choice_from_list
Specs for future #get_yes_no_choice method