[hacknews] HP plotter arc routine revised

henry@utzoo.UUCP (Henry Spencer) (08/05/84)

Revised the arc() routine from the HP plotter plot(3) library to
fix some bugs discovered in the course of testing.
-- 
				Henry Spencer @ U of Toronto Zoology
				{allegra,ihnp4,linus,decvax}!utzoo!henry