Add frb_to_s to Ruby's String class
Add frb_to_s to Ruby's Array class
Parses converts integers to actual integers
Do not try to convert strings to numbers; numbers must be numbers
Add frb_to_s to Ruby's Integer class
Extract #frb_print
Extract #frb_add
Extract #exec_list3
Reorder methods in fnrb.rb
Convert case statement to hash lookup
Use single line 'if' instead of multiline; move a comment
Convert loop to list reduction
Change #run to accept source code rather than command line args
Add requirements for +
Add requirements for print
Retire blackbox_test; replaced with requirements tests
Retire unit tests that overlap requirement tests
Move unit test to requirement test
Move quote unit tests to requirement tests
Add #run to String to simplify test code