code: def parse_substitution_from_list(list_rep):
      
      # We are expecting [pattern, replacement [, is_multiline]]
      if type(list_rep) is not list:
          raise SyntaxError('Substitution must be a list')
      if len(list_rep) < 2:
          raise SyntaxError('Substitution must be a list of size 2')
  
      pattern = list_rep[0]
      replacement = list_rep[1]
  
      # By default, substitutions are not multiline.
      is_multiline = False
      if (len(list_rep) > 2):
          is_multiline = list_rep[2]
          if type(is_multiline) is not bool:
              raise SyntaxError('is_multiline must be a boolean')
  
      result = substitute.Substitution(pattern, replacement, is_multiline)
      return result
docs: Parse a substitution from the list representation in the config file.