gsub(/suffix\z/, '') can be replaced by delete_suffix('suffix') RB-PR1027
Performance
Major
Autofix The delete_suffix('suffix') method is faster than gsub(/suffix\z/, '').
Bad practice
str.gsub(/suffix\z/, '')
str.gsub!(/suffix\z/, '')
str.gsub(/suffix$/, '')
str.gsub!(/suffix$/, '')
Recommended
str.delete_suffix('suffix')
str.delete_suffix!('suffix')