Fix a type with class 2 exercise 1
Fix typos with class 2 exercise 1 and 2
Switch the guide to use single-quoted strings by default
Fix typo with class 2 exercise 1 spec
Improve specs for class 2 exercise 4
Improve specs for class 2 exercise 5
Improve specs for class 2 exercise 6
Merge branch 'master' of https://github.com/codefellows/sea-c21-ruby
Fix rubocop
Merge branch 'master' of https://github.com/codefellows/sea-c21-ruby
Ignore .DS_Store
Merge branch 'master' of https://github.com/codefellows/sea-c21-ruby
Completed exercise 1, 2, 3
Add exercise 4 solution
Add exercises 5, 6, 7 solutions