fix typo in code comment for angle generator

Author: Paul Kienzle

explore/angles.py

@@ -223,8 +223,8 @@ def print_steps(jitter, jitter_inv, view, view_inv, qc_only):
     )
 
     comment("\n**** qab from qc ****")
-    # The indirect calculation of qab is better than directly c
-    # alculating qab^2 = qa^2 + qb^2 since qc can be computed
+    # The indirect calculation of qab is better than directly
+    # calculating qab^2 = qa^2 + qb^2 since qc can be computed
     # as qc = M31*qx + M32*qy, thus requiring only two elements
     # of the rotation matrix.
     #vprint(qab, sqrt(qa**2 + qb**2), "Direct calculation of qab")