fix rounding in rainbow()

[landfillbaby]

this is my first ruby code! i hope it works!
this way the colours are a sine wave from 0-255, rounded properly :)
the current code is 1-255

[mathieu-aubin]

essentially, this adds the missing 256th color?
as in 0 to 255? COLOR_NUMBER=$(255+1)
two-five-six, that add the 0, (zero, not null maybe)
is it just making the rainbow use two hundred and fifty six colors?

OH! NO! what a terrible mistake i made. It doesnt add anything but the (very small) possibility of enfing up generating rgb(0,0,0) which would really suck on a black background terminal

Im just having fun with you, hahhàaha... no harm intended. Felt like throwing some bad humor while i ping this

Oh, also... when you say "hope it works" - does it mean you havnt tried?

[galastiaos]

BTW i think you guys should probably fix this issue- its been open for 2 years now