chore: adjust formatting to new clang-format.

- fixes wrapping for object literal keys called `template`.
- spacing in destructuring expressions.
- changes to keep trailing return types of functions closer to their
  function declaration.
- better formatting of string literals.

Closes #4828

modules/angular2/src/core/util/decorators.ts

@@ -236,8 +236,8 @@ if (!(Reflect && Reflect.getMetadata)) {
   throw 'reflect-metadata shim is required when using class decorators';
 }
 
-export function makeDecorator(annotationCls, chainFn: (fn: Function) => void = null):
-    (...args: any[]) => (cls: any) => any {
+export function makeDecorator(
+    annotationCls, chainFn: (fn: Function) => void = null): (...args: any[]) => (cls: any) => any {
   function DecoratorFactory(objOrType): (cls: any) => any {
     var annotationInstance = new (<any>annotationCls)(objOrType);
     if (this instanceof annotationCls) {