text: Title: Typo in [Strings and the backslashes], missing right parenthesis
  Body: In section Strings and the backslashes, for the explanations, 2nd point with one of the examples as follows
  >  print(repr(r'wt\\"f')
  'wt\\\\"f'
  
  I think the right parenthesis is missing here.  It should be 
  print(repr(r'wt\\"f') **)**
  'wt\\\\"f'
  
  p.s.  I am not sure if others had already bring up this issue, I tried search over existing issues, but I don't find anything related, so i bring it up here.