SEC-1887: Add MethodSecurityOperations interface.

This should cater for implementations which want to use
the full filtering capabilities while creating a custom
expression root object.

Also cleaning whitespace.

web/src/main/java/org/springframework/security/web/access/expression/DefaultWebSecurityExpressionHandler.java

@@ -13,8 +13,8 @@ import org.springframework.security.web.FilterInvocation;
  * @since 3.0
  */
 public class DefaultWebSecurityExpressionHandler extends AbstractSecurityExpressionHandler<FilterInvocation> {
-	
-	private final AuthenticationTrustResolver trustResolver = new AuthenticationTrustResolverImpl();
+
+    private final AuthenticationTrustResolver trustResolver = new AuthenticationTrustResolverImpl();
 
     @Override
     protected SecurityExpressionOperations createSecurityExpressionRoot(Authentication authentication, FilterInvocation fi) {