Merge branch '1.5.x'

spring-boot/src/main/java/org/springframework/boot/builder/SpringApplicationBuilder.java

@@ -241,7 +241,10 @@ public class SpringApplicationBuilder {
 
 	/**
 	 * Create a sibling application (one with the same parent). A side effect of calling
-	 * this method is that the current application (and its parent) are started.
+	 * this method is that the current application (and its parent) are started without
+	 * any arguments if they are not already running. To supply arguments when starting
+	 * the current application and its parent use {@link #sibling(Object[], String...)}
+	 * instead.
 	 * @param sources the sources for the application (Spring configuration)
 	 * @return the new sibling builder
 	 */