┌────────────────────────────────────────────────────┐
│    Clear to end of the current line or display.    │
└────────────────────────────────────────────────────┘

Blank spaces of the display attribute specified are
printed, starting at the current cursor position and
continuing to the end of the line or, optionally, to
the end of the screen.

If no attribute is specified, the routine defaults to
the colour of the character under the cursor.