Fix prettier issues.

Author: Robert Jackson

packages/@ember/-internals/metal/index.ts

@@ -53,7 +53,13 @@ export { default as expandProperties } from './lib/expand_properties';
 export { addObserver, activateObserver, removeObserver, flushAsyncObservers } from './lib/observer';
 export { Mixin, aliasMethod, mixin, observer, applyMixin } from './lib/mixin';
 export { default as inject, DEBUG_INJECTION_FUNCTIONS } from './lib/injected_property';
-export { tagForProperty, createTagForProperty, tagFor, markObjectAsDirty, CUSTOM_TAG_FOR } from './lib/tags';
+export {
+  tagForProperty,
+  createTagForProperty,
+  tagFor,
+  markObjectAsDirty,
+  CUSTOM_TAG_FOR,
+} from './lib/tags';
 export {
   consume,
   Tracker,

packages/@ember/-internals/metal/lib/tags.ts

@@ -20,7 +20,11 @@ export function tagForProperty(object: any, propertyKey: string | symbol, _meta?
   return createTagForProperty(object, propertyKey);
 }
 
-export function createTagForProperty(object: object, propertyKey: string | symbol, _meta?: Meta): Tag {
+export function createTagForProperty(
+  object: object,
+  propertyKey: string | symbol,
+  _meta?: Meta
+): Tag {
   let meta = _meta === undefined ? metaFor(object) : _meta;
 
   let tags = meta.writableTags();