code: def wikitext_detokenizer(string):
      # contractions
      string = string.replace("s '", "s'")
      string = re.sub(r"/' [0-9]/", r"/'[0-9]/", string)
      # number separators
      string = string.replace(" @-@ ", "-")
      string = string.replace(" @,@ ", ",")
      string = string.replace(" @.@ ", ".")
      # punctuation
      string = string.replace(" : ", ": ")
      string = string.replace(" ; ", "; ")
      string = string.replace(" . ", ". ")
      string = string.replace(" ! ", "! ")
      string = string.replace(" ? ", "? ")
      string = string.replace(" , ", ", ")
      # double brackets
      string = re.sub(r"\(\s*([^\)]*?)\s*\)", r"(\1)", string)
      string = re.sub(r"\[\s*([^\]]*?)\s*\]", r"[\1]", string)
      string = re.sub(r"{\s*([^}]*?)\s*}", r"{\1}", string)
      string = re.sub(r"\"\s*([^\"]*?)\s*\"", r'"\1"', string)
      string = re.sub(r"'\s*([^']*?)\s*'", r"'\1'", string)
      # miscellaneous
      string = string.replace("= = = =", "====")
      string = string.replace("= = =", "===")
      string = string.replace("= =", "==")
      string = string.replace(" " + chr(176) + " ", chr(176))
      string = string.replace(" \n", "\n")
      string = string.replace("\n ", "\n")
      string = string.replace(" N ", " 1 ")
      string = string.replace(" 's", "'s")
  
      return string
  
imports: import re
label_desc: Use image node_id 2 for calling a global function with example usage: wikitext_detokenizer(string) and returns: string