Spelling fix in pictogram comment block.

Author: gedeschaines

tutorial2x.py

@@ -166,7 +166,7 @@
            (2) ODE body 2 corresponding to rod 2 is positioned wrt to body
                1 and the initial angle of rod 2 is set to Theta0_2, but the
                angle of ODE joint 2, which attaches body 2 to body 1, is
-               lways initialized to zero by ODE. Since the angle value
+               always initialized to zero by ODE. Since the angle value
                returned by the ODE getAngle method for joint 2 is equivalent
                to T2 minus T1 as depicted above, the sum of Theta0_2 and 
                the getAngle value for joint 1 must be added to the getAngle