code: def pull_requests(self):
          '''
          Looks for any of the following pull request formats in the description field:
  
              pr12345, pr 2345, PR2345, PR 2345
          '''
          pr_numbers = re.findall(r"[pP][rR]\s?[0-9]+", self.description)
          pr_numbers += re.findall(re.compile("pull\s?request\s?[0-9]+", re.IGNORECASE), self.description)
  
          # Remove Duplicates
          pr_numbers = [re.sub('[^0-9]','', p) for p in pr_numbers]
          return pr_numberf pull_requests(self):
          '''
          Looks for any of the following pull request formats in the description field:
  
              pr12345, pr 2345, PR2345, PR 2345
          '''
          pr_numbers = re.findall(r"[pP][rR]\s?[0-9]+", self.description)
          pr_numbers += re.findall(re.compile("pull\s?request\s?[0-9]+", re.IGNORECASE), self.description)
  
          # Remove Duplicates
          pr_numbers = [re.sub('[^0-9]','', p) for p in pr_numbers]
          return pr_numbers
docs: Looks for any of the following pull request formats in the description field:
  
              pr12345, pr 2345, PR2345, PR 2345