[canmet] Fix a couple of typos

2013-canmet/s05/s05_t02_2013-06-21.txt

@@ -12,4 +12,4 @@ away from the wall (depending where the distance measurement is taken),
 and is not in line of sight with CP2.
 
 When on the west side, it is between 5 and 10 cm away from the wall and
-is in line of sight with the two CPs.
+is in line of sight with both CPs.

2013-canmet/s31/s31_t01_2013-06-26_10:07.txt

@@ -3,7 +3,7 @@
 
 This test is split is six sections, corresponding to six aggregation
 files. Since the operator of the aggregation server was not in the
-vehicle, it was hard enough to know exactly when the vehicle's driver
+vehicle, it was quite hard to know exactly when the vehicle's driver
 started driving. Furthermore, it is not easy to keep a constant speed
 when driving in the tunnels (especially when going through doors,
 angles, narrower drifts, etc.). We are forced to assume a constant speed