Luacheck results
/home/ko/local/bin/luajit
Checking ffi/SDL2_0.lua                           1 warning

    ffi/SDL2_0.lua:221:8: 'not (x > y)' can be replaced by 'x <= y' (if neither side is a table or NaN)

Checking ffi/mupdf.lua                            1 warning

    ffi/mupdf.lua:111:8: 'not (x > y)' can be replaced by 'x <= y' (if neither side is a table or NaN)

Checking ffi/rtc.lua                              2 warnings

    ffi/rtc.lua:259:8: 'not (x == y)' can be replaced by 'x ~= y' (if neither side is a table or NaN)
    ffi/rtc.lua:263:23: 'not (x == y)' can be replaced by 'x ~= y' (if neither side is a table or NaN)

Total: 4 warnings / 0 errors in 90 files

Exited with code exit status 1