938116efd7
`base64` generates 76-character chunks of text, delimited by a space character. the `=+/` characters are removed, so on the (uniformly random) offchance that 44 characters are removed, the last `dd` will read a whitespace, and the token will include a whitespace, which "usually" isn't defined as an "alphanumeric character." Removing the space character as well, would mean that 142 of the characters would have to be a `=+/[:space:]`, before the token becomes shorter.