Fix trailing whitespace

Author: Dev-06-06

exercises/1000_programs/medium/1870_min_speed.py

@@ -19,7 +19,7 @@ def minSpeedOnTime(dist, hour):
             ans = mid
             right = mid - 1
         else:
-            left = mid + 1     
+            left = mid + 1
     return ans
 # Driver code to test locally
 if __name__ == "__main__":