fix: use void IIFE for webpack plugin, fixes #1309

.prettierignore

@@ -10,5 +10,4 @@ index.js
 patch.js
 root.js
 test/hot/react-dom
-coverage
-src/webpack/webpackTagCommonJSExports.js
+coverage

src/webpack/index.js

@@ -49,14 +49,15 @@ function transform(source, map) {
       // Ideally we'd opt out for one file but this is simpler.
       .replace(/['"]use strict['"];/, '')
       // eslint comments don't need to end up in the output
+      .replace(/\/\* (.*) \*\//, '')
       .replace(/\/\/ eslint-disable-line .*\n/g, '\n')
       .replace(/\/\* global.*\*\//, '')
       .split(/\n\s*/)
       .join(' ');
   }
 
   // Parameterize the helper with the current filename.
-  const separator = '\n\n;';
+  const separator = '\n';
   const appendText = tagCommonJSExportsSource.replace(/__FILENAME__/g, JSON.stringify(resourcePath));
 
   if (this.sourceMap === false) {

src/webpack/webpackTagCommonJSExports.js

@@ -1,7 +1,7 @@
 /* eslint-disable global-require, import/no-unresolved, no-var, camelcase, func-names */
 /* global __FILENAME__, reactHotLoaderGlobal */
 
-;(function register() {
+void (function register() {
   // eslint-disable-line no-extra-semi
   /* react-hot-loader/webpack */
   var safe_require = function() {