$ toybox diff -F '{ *$' a b
diff: Max 2 arguments (see "diff --help")

This is confusing, because diff --help lists -F, leading me to think it's supported, but it doesn't appear to be, I couldn't find it in the code.

We're trying to change the android build system to use the toybox diff, and ran into this issue. We have some usages of -F that we're leaning towards just removing now, but this bug could also be considered a feature request for it.