def clean_title title
      title.gsub(GENDER_FILTER,'').
            gsub(SYMBOL_FILTER,'').
            gsub(WORDS_IN_BRACKETS, '\1').
            gsub(CODE_TOKEN_FILTER,'').
            gsub(WHITESPACE,' ').
            downcase.
            strip
    end
def clean_title title
      title.gsub(GENDER_FILTER,'').
            gsub(SYMBOL_FILTER,'').
            gsub(WORDS_IN_BRACKETS, '\1').
            gsub(CODE_TOKEN_FILTER,'').
            gsub(WHITESPACE,' ').
            downcase.
            strip
    end
converts string into a cleaner version
 @param  title [String] job title

 @return [String] clean and lowercase version of input