Update RWRouteConfig.java (#940)

Signed-off-by: eddieh-xlnx <eddie.hung@amd.com>

Author: eddieh-xlnx

src/com/xilinx/rapidwright/rwroute/RWRouteConfig.java

@@ -893,9 +893,9 @@ public String toString() {
         s.append(MessageGenerator.formatString("Include U-turn nodes: ", useUTurnNodes));
         s.append(MessageGenerator.formatString("Initial present congestion factor: ", initialPresentCongestionFactor));
         s.append(MessageGenerator.formatString("Present congestion multiplier: ", presentCongestionMultiplier));
-        s.append(MessageGenerator.formatString("Historical congestion factor ", historicalCongestionFactor));
-        s.append(MessageGenerator.formatString("LUT pin swapping ", isLutPinSwapping()));
-        s.append(MessageGenerator.formatString("LUT routethrus ", isLutRoutethru()));
+        s.append(MessageGenerator.formatString("Historical congestion factor: ", historicalCongestionFactor));
+        s.append(MessageGenerator.formatString("LUT pin swapping: ", isLutPinSwapping()));
+        s.append(MessageGenerator.formatString("LUT routethrus: ", isLutRoutethru()));
 
         return s.toString();
     }