s/controla/controlla/g

Change-Id: I03c0f320181b969edb271cded8a80dcebd12334e
diff --git a/y2015_bot3/control_loops/python/controls.py b/y2015_bot3/control_loops/python/controls.py
index b66bd56..6fc7c63 100755
--- a/y2015_bot3/control_loops/python/controls.py
+++ b/y2015_bot3/control_loops/python/controls.py
@@ -92,9 +92,9 @@
   return numpy.matrix(ans_a), numpy.matrix(ans_b)
 
 def ctrb(A, B):
-  """Returns the controlability matrix.
+  """Returns the controllability matrix.
 
-    This matrix must have full rank for all the states to be controlable.
+    This matrix must have full rank for all the states to be controllable.
   """
   n = A.shape[0]
   output = B