RuboCop code analyzer
Refactor RuboCop Metrics/MethodLength rule
RuboCop Metrics/ParameterLists rule
RuboCop Style/BlockComments rule
RuboCop Style/EmptyLinesAroundAccessModifier rule
RuboCop Style/EmptyLinesAroundClassBody rule
RuboCop Style/HashSyntax rule
RuboCop Style/IfUnlessModifier rule
RuboCop Style/IndentationWidth rule
RuboCop Style/PercentLiteralDelimiters rule
RuboCop Style/RegexpLiteral rule
RuboCop Style/SignalException rule
RuboCop Style/SpaceInsideBlockBraces rule
RuboCop Style/TrailingBlankLines rule
RuboCop Style/TrailingComma rule
RuboCop Style/UnneededPercentQ rule
RuboCop Style/WordArray rule
RuboCop Metrics/LineLength rule
RuboCop Style/StringLiterals rule
RuboCop rules fix

Cleaning auto-generated spec_helper.rb, .gemspec and Guardfile files