Update README.md

Author: hasanbalci

README.md

@@ -95,7 +95,7 @@ var defaultOptions = {
   // Gravity range (constant)
   gravityRange: 3.8,
   // Initial cooling factor for incremental layout
-  initialEnergyOnIncremental:0.5
+  initialEnergyOnIncremental: 0.5
 };
 ```