enable cops one by one

[bkleinen]

enable all disabled cops in .rubocop.yml one by one (those at the bottom tend to have less offenses),
and fix the offenses.
After fixing a few, commit with fixed # , comment here which have been fixed
and open a new issue with the remaining ones.

see https://docs.rubocop.org/rubocop/1.64/index.html

Style/Encoding:
Enabled: false

Layout/LineLength:
Max: 194
Enabled: false

Metrics/BlockLength:
Enabled: false
Max: 26

Metrics/ClassLength:
Enabled: false
Max: 152

Lint/NonAtomicFileOperation:
Enabled: false

Metrics/MethodLength:
Enabled: false

Style/MixinUsage:
Enabled: false

Lint/ConstantDefinitionInBlock:
Enabled: false

Style/Documentation:
Enabled: false

Metrics/AbcSize:
Enabled: false

Naming/MethodParameterName:
Enabled: false

Metrics/PerceivedComplexity:
Enabled: false

Metrics/CyclomaticComplexity:
Enabled: false

Lint/MissingSuper:
Enabled: false

Security/Eval:
Enabled: false

Style/OptionalBooleanParameter:
Enabled: false

Lint/EmptyBlock:
Enabled: false

Naming/FileName:
Enabled: false

Naming/PredicateName:
Enabled: false

Style/MultilineBlockChain:
Enabled: false

Lint/ShadowingOuterLocalVariable:
Enabled: false

Lint/RescueException:
Enabled: false

Lint/UnreachableCode:
Enabled: false

Lint/UnderscorePrefixedVariableName:
Enabled: false

Naming/AccessorMethodName:
Enabled: false

Style/ClassVars:
Enabled: false

Lint/DuplicateBranch:
Enabled: false

Naming/MethodName:
Enabled: false

Lint/UnreachableLoop:
Enabled: false

Metrics/BlockNesting:
Enabled: false

Style/TernaryParentheses:
Enabled: false

Naming/VariableNumber:
Enabled: false