if both [ and ] are held, let the cursor only move vertically and horizontally
right now if you hold [ and ] it just locks the cursor in place until one of them is let go, which has no use whatsoever and was probably implemented by accident
>let the cursor only move vertically and horizontally
thats a really roundabout way of saying "let it move freely", unless you had some other idea in mind
as of right now, holding both brackets darkens the screen, except for two lines around the cursor:
http://image.prntscr.com/image/39369d16fccb4a03a2796f0f223cc9ba.png
given how holding [ only lets the cursor move across a light horizontal line, and ] is the same with a vertical line, holding [ and ] both at once should probably let the cursor move across those lightened tiles only.