Remove trailing spaces from comments

Author: ErikSchierboom

exercises/split-second-stopwatch/canonical-data.json

@@ -4,12 +4,12 @@
     "All times are formatted in '<hours>:<minutes>:<seconds>' format.",
     "Hours, minutes, and seconds are formatted using two digits.",
     "Thus 4 hours, 23 minutes, and 6 seconds is represented as '04:23:06'.",
-    "Tracks are free to convert these times into a format that is the most ",
+    "Tracks are free to convert these times into a format that is the most",
     "appropriate for their language.",
     "",
-    "The advanceTime command is used to simulate the passage of time. ",
-    "Some tracks might be able to mock the system time, others might need ",
-    "to provide some time-representing value, while other might need to ",
+    "The advanceTime command is used to simulate the passage of time.",
+    "Some tracks might be able to mock the system time, others might need",
+    "to provide some time-representing value, while other might need to",
     "pass the current time as an argument to the other commands."
   ],
   "cases": [