does wither damage from Sickle Ripper heal at the end of turn like other dmg?

does dmg from Sickle Ripper go away when turns end like with other creatures

Damage from a creature with wither or infect is in the form of -1/-1 counters, which stick around until something takes them off (ie. Power Conduit).

does regenerating remove that damage?

No.

but here:
http://www.rarityguide.com/forums/ma...-creature.html

you said that wither damage is still damage

and regenerate says:
remove all damage from it

so if wither damage is still damage how come its not removed by regenerate?

I think you're a bit confused on what exactly "wither damage" is. When damage is dealt to a creature, it usually results in that much damage being marked on the creature. If the source dealing damage has wither, however, then that doesn't happen. Instead, that many -1/-1 counters are put on the creature. -1/-1 counters themselves aren't damage - they're just the result of the damage.