docs: def extraneous_whitespace(logical_line):
      """
      Avoid extraneous whitespace in the following situations:
  
      - Immediately inside parentheses, brackets or braces.
  
      - Immediately before a comma, semicolon, or colon.
      """
      line = logical_line
      for char in '([{':
          found = line.find(char + ' ')
          if found > -1:
              return found + 1, "E201 whitespace after '%s'" % char
      for char in '}])':
          found = line.find(' ' + char)
          if found > -1 and line[found - 1] != ',':
              return found, "E202 whitespace before '%s'" % char
      for char in ',;:':
          found = line.find(' ' + char)
          if found > -1:
              return found, "E203 whitespace before '%s'" % char