:DESC
Removes a unicode box which had colored its contents, restoring the original monochrome text.

:ARGS
-r
:INPUT
    [0;31m▄[0m[31m▄[0m[37;41m CRITICAL [0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m[0;31m▄[0m
    [31m█[37;48;2;128;0;0m                         [31m█[0m
    [31m█[37;48;2;128;0;0m  Aaargh, let go of me!  [31m█[0m
    [31m█[37;48;2;128;0;0m                         [31m█[0m
    [31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m[31m▀[0m
:OUTPUT-FILTER
:EXPECTED
    Aaargh, let go of me!
:EOF
