Fix missing space in logging message

Closes gh-3298

Author: joshthornhill

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2014 the original author or authors.
+ * Copyright 2012-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -392,7 +392,7 @@ private PropertySource<?> loadIntoGroup(String identifier, String location,
 			msg.append("config file ");
 			msg.append("'").append(location).append("'");
 			if (StringUtils.hasLength(profile)) {
-				msg.append(" for profile" + profile);
+				msg.append(" for profile ").append(profile);
 			}
 			if (resource == null || !resource.exists()) {
 				msg.append(" resource not found");