refactoring by rubocop auto fix
fix rubocop warn. delelete unnecessary coron.
fix rubocop warn. devide method.
fix rubocop warn. devide method.
fix rubocop warn. devide method.
fix rubocop warn. merge if a-if b conditions to if a && b.
fix rubocop warn. add documentation comment.
fix rubocop warn.
fix rubocop warn. add information variable
fix rubocop warn. devide method
fix rubocop warn. change alias to alias_method
fix rubocop warn. change or to ||
fix rubocop warn. add encoding settings
fix rubocop warn. remove unuse variable
remove unuse blank line
remove unuse blank line
fix rubocop warn. string array declare [] to %w{}
fix rubocop warn.
fix rubocop warn. remove unuse variable
remove unuse blank line