char= see description
bottomrow= see description
rightcolumn= see description
Fills an rectangular area with the character
rightcolumn default to their bottom-most/right-most valid values.
rightcolumn this sequence does nothing.
char is a not a printable latin1 character code (32 <=
char < 127 or 160 <=
char <= 255) this sequence does nothing. Otherwise it fills all cells in the given rectangle with the char
The other attributes of the cells are replaced by the current SGR state.
If filling the cells splits a multi cell character that character cleared, by replacing it by spaces, keeping its current attributes.
When only some of the lines have set set double width line, the region this sequence acts upon might not look rectangular in to the user on display.