Merge pull request eugenp#6076 from amit2103/BAEL-11403

[BAEL-11403] - Moved DoubleToString and DoubleToStringUnitTest to jav…

Author: lor6

core-java/src/main/java/com/baeldung/string/DoubleToString.java renamed to java-numbers/src/main/java/com/baeldung/string/DoubleToString.java

@@ -38,4 +38,5 @@ public static String roundWithDecimalFormat(double d) {
         return df.format(d);
     }
 
+    
 }