On Mon, Mar 30, 2020 at 3:14 PM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> My nightly check-all-the-patches-for-various-cruft script emails me
> about =3D but I didn't' have a test for "o=$m". I just added one.
=3D may be the common one, but =20 and =09 are others that end up
showing up when whitespace gets quoted for various reasons.
Another one is =46 for 'F'. Why? Because some mailers think that
"From" at the beginning of a line is the mbox beginning marker, and
they'll escape any line that begins with "From" to use "=46rom"
instead.
Those mailers are wrong (at a _minimum_ it's "From " with a space, and
you generally should be even stricter than that), but it happens.
And obviously, if there is real 8-bit stuff, you'll get all the real
odd hex noise.
Linus
