rubocop: better nil comparison fix
rubocop: better "Comparison of something with itself" fix
rubocop: enable and fix "Style/AlignHash"

use "table" style
rubocop: enable and fix "Style/MultilineOperationIndentation"
rubocop: enable and fix "Style/AlignArray"
rubocop: enable "Style/AlignParameters"

use "with_fixed_indentation" style
rubocop: set max. line lenght to 100, fix the long lines