Polish

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/env/PropertySourceLoader.java

@@ -41,7 +41,7 @@ public interface PropertySourceLoader {
 	/**
 	 * Load the resource into one or more property sources. Implementations may either
 	 * return a list containing a single source, or in the case of a multi-document format
-	 * such as yaml a source or each document in the resource.
+	 * such as yaml a source for each document in the resource.
 	 * @param name the root name of the property source. If multiple documents are loaded
 	 * an additional suffix should be added to the name for each source loaded.
 	 * @param resource the resource to load