Don't add dangling commas to functions for packaging fixtures (#10264)

fixtures/packaging/systemjs-builder/dev/input.js

@@ -3,5 +3,5 @@ import ReactDOM from 'react-dom';
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

fixtures/packaging/systemjs-builder/prod/input.js

@@ -3,5 +3,5 @@ import ReactDOM from 'react-dom';
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

fixtures/packaging/webpack-alias/dev/input.js

@@ -3,5 +3,5 @@ var ReactDOM = require('react-dom');
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

fixtures/packaging/webpack-alias/prod/input.js

@@ -3,5 +3,5 @@ var ReactDOM = require('react-dom');
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

fixtures/packaging/webpack/dev/input.js

@@ -3,5 +3,5 @@ var ReactDOM = require('react-dom');
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

fixtures/packaging/webpack/prod/input.js

@@ -3,5 +3,5 @@ var ReactDOM = require('react-dom');
 
 ReactDOM.render(
   React.createElement('h1', null, 'Hello World!'),
-  document.getElementById('container'),
+  document.getElementById('container')
 );

scripts/prettier/index.js

@@ -35,10 +35,14 @@ const defaultOptions = {
 const config = {
   default: {
     patterns: ['src/**/*.js', 'fixtures/**/*.js'],
-    ignore: ['**/third_party/**', '**/node_modules/**'],
+    ignore: [
+      '**/third_party/**',
+      '**/node_modules/**',
+      'fixtures/packaging/**/*.js',
+    ],
   },
   scripts: {
-    patterns: ['scripts/**/*.js'],
+    patterns: ['scripts/**/*.js', 'fixtures/packaging/**/*.js'],
     ignore: ['scripts/bench/benchmarks/**'],
     options: {
       'trailing-comma': 'es5',