Daniel Bertalan 7419569a2b Kernel+LibVT: Add function for deleting a range of characters ...

Previously, this was done by telling the client to put a space at each
character in the range. This was inefficient, because a large number of
function calls took place and incorrect, as the ANSI standard dictates
that character attributes should be cleared as well.

The newly added `clear_in_line` function solves this issue. It performs
just one bounds check when it's called and can be implemented as a
pretty tight loop.

2021-06-10 17:18:02 +02:00

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