Blocking call that waits for an open subprocess slot. This is
automatically called by :meth:`Shell.call`.
"""
- # XXX: This API sucks; the actuall call/callAsUser call should
+ # XXX: This API sucks; the actual call/callAsUser call should
# probably block automatically (unless I have a good reason not to)
# bail out immediately on initial ramp up
if len(self.running) < self.max: return