Fix typo

Author: rstoyanchev

spring-test-mvc/src/main/java/org/springframework/test/web/servlet/setup/StandaloneMockMvcBuilder.java

@@ -301,7 +301,7 @@ public StandaloneMockMvcBuilder setRemoveSemicolonContent(boolean removeSemicolo
 	 * can be resolved. Alternatively consider creating a test that initializes a
 	 * {@link WebApplicationContext}.
 	 */
-	public StandaloneMockMvcBuilder addPlaceHolderValues(String name, String value) {
+	public StandaloneMockMvcBuilder addPlaceHolderValue(String name, String value) {
 		this.placeHolderValues.put(name, value);
 		return this;
 	}

spring-test-mvc/src/test/java/org/springframework/test/web/servlet/setup/StandaloneMockMvcBuilderTests.java

@@ -41,7 +41,7 @@ public void placeHoldersInRequestMapping() throws Exception {
 
 		StubWebApplicationContext cxt = new StubWebApplicationContext(new MockServletContext());
 		StandaloneMockMvcBuilder builder = new StandaloneMockMvcBuilder(new PlaceholderController());
-		builder.addPlaceHolderValues("sys.login.ajax", "/foo");
+		builder.addPlaceHolderValue("sys.login.ajax", "/foo");
 		builder.initWebAppContext(cxt);
 
 		RequestMappingHandlerMapping hm = cxt.getBean(RequestMappingHandlerMapping.class);