sendgmail: wrapping lines incorrectly at 72 chars

[paralin]

#32 (comment)

I am trying to send messages via the API: https://github.com/paralin/sendgmailapi

However recipients of the emails, sent with git send-email, are complaining that Gmail is wrapping the lines incorrectly: https://lore.kernel.org/buildroot/20240914110036.13d08b21@windsurf/T/

And indeed in that patch you can see Gmail has added newlines in the wrong places.

Was there any way around this other than using SMTP?

[paralin]

#32 (comment) suggests running through a quoted-printable encoder with = before line breaks: https://stackoverflow.com/a/40122515/431369