def pre_normalize(text)
      text = text.to_s.downcase
      text.gsub!(/\b(\d{1,2})\.(\d{1,2})\.(\d{4})\b/, '\3 / \2 / \1')
      text.gsub!(/\b([ap])\.m\.?/, '\1m')
      text.gsub!(/(\s+|:\d{2}|:\d{2}\.\d+)\-(\d{2}:?\d{2})\b/, '\1tzminus\2')
      text.gsub!(/\./, ':')
      text.gsub!(/([ap]):m:?/, '\1m')
      text.gsub!(/'(\d{2})\b/) do
        number = $1.to_i

        if Chronic::Date::could_be_year?(number)
          Chronic::Date::make_year(number, options[:ambiguous_year_future_bias])
        else
          number
        end
      end
      text.gsub!(/['"]/, '')
      text.gsub!(/,/, ' ')
      text.gsub!(/^second /, '2nd ')
      text.gsub!(/\bsecond (of|day|month|hour|minute|second|quarter)\b/, '2nd \1')
      text.gsub!(/\bthird quarter\b/, '3rd q')
      text.gsub!(/\bfourth quarter\b/, '4th q')
      text.gsub!(/quarters?(\s+|$)(?!to|till|past|after|before)/, 'q\1')
      text = Numerizer.numerize(text)
      text.gsub!(/\b(\d)(?:st|nd|rd|th)\s+q\b/, 'q\1')
      text.gsub!(/([\/\-\,\@])/) { ' ' + $1 + ' ' }
      text.gsub!(/(?:^|\s)0(\d+:\d+\s*pm?\b)/, ' \1')
      text.gsub!(/\btoday\b/, 'this day')
      text.gsub!(/\btomm?orr?ow\b/, 'next day')
      text.gsub!(/\byesterday\b/, 'last day')
      text.gsub!(/\bnoon|midday\b/, '12:00pm')
      text.gsub!(/\bmidnight\b/, '24:00')
      text.gsub!(/\bnow\b/, 'this second')
      text.gsub!('quarter', '15')
      text.gsub!('half', '30')
      text.gsub!(/(\d{1,2}) (to|till|prior to|before)\b/, '\1 minutes past')
      text.gsub!(/(\d{1,2}) (after|past)\b/, '\1 minutes future')
      text.gsub!(/\b(?:ago|before(?: now)?)\b/, 'past')
      text.gsub!(/\bthis (?:last|past)\b/, 'last')
      text.gsub!(/\b(?:in|during) the (morning)\b/, '\1')
      text.gsub!(/\b(?:in the|during the|at) (afternoon|evening|night)\b/, '\1')
      text.gsub!(/\btonight\b/, 'this night')
      text.gsub!(/\b\d+:?\d*[ap]\b/,'\0m')
      text.gsub!(/\b(\d{2})(\d{2})(am|pm)\b/, '\1:\2\3')
      text.gsub!(/(\d)([ap]m|oclock)\b/, '\1 \2')
      text.gsub!(/\b(hence|after|from)\b/, 'future')
      text.gsub!(/^\s?an? /i, '1 ')
      text.gsub!(/\b(\d{4}):(\d{2}):(\d{2})\b/, '\1 / \2 / \3') # DTOriginal
      text.gsub!(/\b0(\d+):(\d{2}):(\d{2}) ([ap]m)\b/, '\1:\2:\3 \4')
      text
    end
def pre_normalize(text)
      text = text.to_s.downcase
      text.gsub!(/\b(\d{1,2})\.(\d{1,2})\.(\d{4})\b/, '\3 / \2 / \1')
      text.gsub!(/\b([ap])\.m\.?/, '\1m')
      text.gsub!(/(\s+|:\d{2}|:\d{2}\.\d+)\-(\d{2}:?\d{2})\b/, '\1tzminus\2')
      text.gsub!(/\./, ':')
      text.gsub!(/([ap]):m:?/, '\1m')
      text.gsub!(/'(\d{2})\b/) do
        number = $1.to_i

        if Chronic::Date::could_be_year?(number)
          Chronic::Date::make_year(number, options[:ambiguous_year_future_bias])
        else
          number
        end
      end
      text.gsub!(/['"]/, '')
      text.gsub!(/,/, ' ')
      text.gsub!(/^second /, '2nd ')
      text.gsub!(/\bsecond (of|day|month|hour|minute|second|quarter)\b/, '2nd \1')
      text.gsub!(/\bthird quarter\b/, '3rd q')
      text.gsub!(/\bfourth quarter\b/, '4th q')
      text.gsub!(/quarters?(\s+|$)(?!to|till|past|after|before)/, 'q\1')
      text = Numerizer.numerize(text)
      text.gsub!(/\b(\d)(?:st|nd|rd|th)\s+q\b/, 'q\1')
      text.gsub!(/([\/\-\,\@])/) { ' ' + $1 + ' ' }
      text.gsub!(/(?:^|\s)0(\d+:\d+\s*pm?\b)/, ' \1')
      text.gsub!(/\btoday\b/, 'this day')
      text.gsub!(/\btomm?orr?ow\b/, 'next day')
      text.gsub!(/\byesterday\b/, 'last day')
      text.gsub!(/\bnoon|midday\b/, '12:00pm')
      text.gsub!(/\bmidnight\b/, '24:00')
      text.gsub!(/\bnow\b/, 'this second')
      text.gsub!('quarter', '15')
      text.gsub!('half', '30')
      text.gsub!(/(\d{1,2}) (to|till|prior to|before)\b/, '\1 minutes past')
      text.gsub!(/(\d{1,2}) (after|past)\b/, '\1 minutes future')
      text.gsub!(/\b(?:ago|before(?: now)?)\b/, 'past')
      text.gsub!(/\bthis (?:last|past)\b/, 'last')
      text.gsub!(/\b(?:in|during) the (morning)\b/, '\1')
      text.gsub!(/\b(?:in the|during the|at) (afternoon|evening|night)\b/, '\1')
      text.gsub!(/\btonight\b/, 'this night')
      text.gsub!(/\b\d+:?\d*[ap]\b/,'\0m')
      text.gsub!(/\b(\d{2})(\d{2})(am|pm)\b/, '\1:\2\3')
      text.gsub!(/(\d)([ap]m|oclock)\b/, '\1 \2')
      text.gsub!(/\b(hence|after|from)\b/, 'future')
      text.gsub!(/^\s?an? /i, '1 ')
      text.gsub!(/\b(\d{4}):(\d{2}):(\d{2})\b/, '\1 / \2 / \3') # DTOriginal
      text.gsub!(/\b0(\d+):(\d{2}):(\d{2}) ([ap]m)\b/, '\1:\2:\3 \4')
      text
    end
Clean up the specified text ready for parsing.

 Clean up the string by stripping unwanted characters, converting
 idioms to their canonical form, converting number words to numbers
 (three => 3), and converting ordinal words to numeric
 ordinals (third => 3rd)

 text - The String text to normalize.

 Examples:

   Chronic.pre_normalize('first day in May')
     #=> "1st day in may"

   Chronic.pre_normalize('tomorrow after noon')
     #=> "next day future 12:00"

   Chronic.pre_normalize('one hundred and thirty six days from now')
     #=> "136 days future this second"

 Returns a new String ready for Chronic to parse.