Flowdock
pre_match() public

Return the pre-match (in the regular expression sense) of the last scan.

  s = StringScanner.new('test string')
  s.scan(/\w+/)           # -> "test"
  s.scan(/\s+/)           # -> " "
  s.pre_match             # -> "test"
  s.post_match            # -> "string"
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