Number to human

1.to_human     # => 'One'
23.to_human    # => 'Twenty three'
1_023.to_human # => 'One hundred and twenty three'

Before commit

• run test
• review code

Run test

rspec

Changelog

• fix issue when converting negative numbers
• add request arabic2english.rb script
• convert number > 999
• convert number < 1000
• convert number < 100
• convert number < 20
• convert small number to human
• test on small number
• add Gemfile with rspec gem