[OpenOS] VT100 does not behave properly with \27[ABCD

[Ocawesome101]

OpenOS's vt100 emulator behaves incorrectly when these are run as \27[{A,B,C,D} but works correctly when run as \27[<n>{A,B,C,D} - my understanding is that, when no number is provided, it should default to 1. It does not appear to do this.

I have verified these in both the actual PUC REPL running on Konsole, and Monolith's Lua prompt, neither of which behaves in the way that OpenOS does.

Reproductions:
open the Lua REPL and run...
\27[A: io.write("\n") for i=32, 126, 1 do io.write("\27[A" .. string.char(i) .. "\n") end vs io.write("\n") for i=32, 126, 1 do io.write("\27[1A" .. string.char(i) .. "\n") end
\27[B: io.write("\n") for i=32, 126, 1 do io.write("\27[B" .. string.char(i) .. "\27[1A") end vs io.write("\n") for i=32, 126, 1 do io.write("\27[1B" .. string.char(i) .. "\27[1A") end
\27[C: io.write("\n") for i=32, 126, 1 do io.write("\27[C" .. string.char(i) .. "\27[1D") end vs io.write("\n") for i=32, 126, 1 do io.write("\27[1C" .. string.char(i) .. "\27[1D") end
\27[D: io.write("test... ") for i=32, 126, 1 do io.write("\27[D" .. string.char(i)) end vs io.write("test... ") for i=32, 126, 1 do io.write("\27[1D" .. string.char(i)) end

[Ocawesome101]

Looking at the VT code, it appears to default to moving 0 characters. As far as I can tell this is incorrect behavior.