[docs] base64 documentation page - English language mistake

Hi, In the second paragraph, first sentence of base64 docs it says "The RFC 3548 encodings are suitable for encoding binary data so that it can safely sent by email, used as parts of URLs, or included as part of an HTTP POST request." but it misses a 'be'. It should be " "The RFC 3548 encodings are suitable for encoding binary data so that it can *be* safely sent by email, used as parts of URLs, or included as part of an HTTP POST request." Link to page: https://docs.python.org/3/library/base64.html Thanks, Kanaji