old_contents: import doctest
  import glob
  import pkg_resources
  
  try:
      pkg_resources.require('OWSLib')
  except (ImportError, pkg_resources.DistributionNotFound):
      pass
  
  testfiles = glob.glob('*.txt')
  
  for file in testfiles: 
      doctest.testfile(file)
  
  
new_contents: import doctest
  import getopt
  import glob
  import sys
  
  import pkg_resources
  
  try:
      pkg_resources.require('OWSLib')
  except (ImportError, pkg_resources.DistributionNotFound):
      pass
  
  def run(pattern):
      if pattern is None:
          testfiles = glob.glob('*.txt')
      else:
          testfiles = glob.glob(pattern)
      for file in testfiles: 
          doctest.testfile(file)
  
  if __name__ == "__main__":
      try:
          opts, args = getopt.getopt(sys.argv[1:], "t:v")
      except getopt.GetoptError:
          print "Usage: python runalldoctests.py [-t GLOB_PATTERN]"
          sys.exit(2)
      pattern = None
      for o, a in opts:
          if o == '-t':
              pattern = a
      run(pattern)
  
  
subject: Add option to pick single test file from the runner