https://bugs.python.org/review/1753718/diff/16149/Doc/library/base64.rst File Doc/library/base64.rst (right): https://bugs.python.org/review/1753718/diff/16149/Doc/library/base64.rst#new... Doc/library/base64.rst:197: If *pad* is true, the input is padded with "\\0" so its length is a padded with b"\\0" https://bugs.python.org/review/1753718/diff/16149/Doc/library/base64.rst#new... Doc/library/base64.rst:198: multiple of 4 characters before encoding. four bytes https://bugs.python.org/review/1753718/