Modernize stage II (#39)

Fix production white-space related offenses

- Layout/AccessModifierIndentation
- Layout/ArgumentAlignment
- Layout/ElseAlignment
- Layout/EmptyLineBetweenDefs
- Layout/EmptyLinesAroundAccessModifier
- Layout/EmptyLinesAroundClassBody
- Layout/EmptyLinesAroundModuleBody
- Layout/EndAlignment
- Layout/ExtraSpacing (and Style/MultilineWhenThen)
- Layout/HeredocIndentation
- Layout/IndentationConsistency
- Layout/IndentationWidth
- Layout/LeadingCommentSpace
- Layout/MultilineMethodCallIndentation
- Layout/SpaceAfterComma
- Layout/SpaceAroundEqualsInParameterDefault
- Layout/SpaceAroundOperators
- Layout/SpaceInLambdaLiteral
- Layout/SpaceInsideArrayLiteralBrackets
- Layout/SpaceInsideBlockBraces
- Layout/SpaceInsideHashLiteralBraces
- Layout/SpaceInsideParens
- Layout/SpaceInsidePercentLiteralDelimiters
- Layout/SpaceInsideRangeLiteral

.rubocop.yml

@@ -12,7 +12,6 @@ AllCops:
   TargetRailsVersion: 7.0
   TargetRubyVersion: 3.0
   Exclude:
-    - 'lib/**/*'
     - 'gemfiles/**/*'
     - 'vendor/bundle/**/*'
     - 'tmp/**/*'