Allow for x = x + 1
first shot
small improvements
final guidelines
Merge pull request #9 from lewagon/guidelines_ruby_iterators

Guidelines ruby iterators
Update README.md
Update TEACHERS.md
Update TEACHERS.md
typos
typos
typos
teachers guidelines
Migrating day 5 of Ruby to rubocop
Merge branch 'master' of github.com:lewagon/promo-4-challenges
Add a rubocop rule to use reduce instead of each_with_index
improvements
improvements
improvements
improvements
improvements