typo fix

slapos/slap/slap.py

@@ -323,7 +323,7 @@ def _syncComputerPartitionInformation(func):
       return func(self, *args, **kw)
     if not self._computer_id:
       # XXX Is it only in case of requesting instance?
-      raise ResourceNotReady("Intance is not ready yet.")
+      raise ResourceNotReady("Instance is not ready yet.")
     # XXX: This is a ugly way to keep backward compatibility,
     # We should stablise slap library soon.
     computer = self._connection_helper.getFullComputerInformation(self._computer_id)