use only raise
space after comma
space after semicolon
space around default param
space around operators
space around block
space inside block
no extra spaces
force double quotes for string literals
also force double_quotes in interpolation
force to not have trailing lines
avoid last item comma
avoid trailing whitespaces
favor trailing form
fix previous commit, do not prefer words and force correct variables names in new code only
use for new code new hash syntax
prefer traling form of if
force good names on new code
make rubocop config final one
add rubocop to travis