diff --git a/examples/chunkhash/README.md b/examples/chunkhash/README.md
index 3527107f0d5..669b7d68036 100644
--- a/examples/chunkhash/README.md
+++ b/examples/chunkhash/README.md
@@ -20,7 +20,7 @@ import("./async2");
 ```javascript
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		main: "./example"
 	},
diff --git a/examples/chunkhash/webpack.config.js b/examples/chunkhash/webpack.config.js
index cc34d5591f9..d913bc14962 100644
--- a/examples/chunkhash/webpack.config.js
+++ b/examples/chunkhash/webpack.config.js
@@ -1,6 +1,6 @@
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		main: "./example"
 	},
diff --git a/examples/coffee-script/webpack.config.js b/examples/coffee-script/webpack.config.js
index 845f9f4c190..91c59cf45a7 100644
--- a/examples/coffee-script/webpack.config.js
+++ b/examples/coffee-script/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	module: {
 		rules: [
 			{
diff --git a/examples/common-chunk-grandchildren/README.md b/examples/common-chunk-grandchildren/README.md
index ec028a663ec..5d2c035e90b 100644
--- a/examples/common-chunk-grandchildren/README.md
+++ b/examples/common-chunk-grandchildren/README.md
@@ -86,7 +86,7 @@ module.exports = function() {
 const path = require("path");
 
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		main: ["./example.js"]
 	},
diff --git a/examples/common-chunk-grandchildren/webpack.config.js b/examples/common-chunk-grandchildren/webpack.config.js
index e8c14e818d9..ea9fdf2323e 100644
--- a/examples/common-chunk-grandchildren/webpack.config.js
+++ b/examples/common-chunk-grandchildren/webpack.config.js
@@ -2,7 +2,7 @@
 const path = require("path");
 
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		main: ["./example.js"]
 	},
diff --git a/examples/dll-app-and-vendor/0-vendor/README.md b/examples/dll-app-and-vendor/0-vendor/README.md
index 03f49db1171..6381a62a31a 100644
--- a/examples/dll-app-and-vendor/0-vendor/README.md
+++ b/examples/dll-app-and-vendor/0-vendor/README.md
@@ -13,7 +13,7 @@ var path = require("path");
 var webpack = require("../../../");
 
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	context: __dirname,
 	entry: ["example-vendor"],
 	output: {
diff --git a/examples/dll-app-and-vendor/0-vendor/webpack.config.js b/examples/dll-app-and-vendor/0-vendor/webpack.config.js
index 3572be39ce8..5a9099cdb5c 100644
--- a/examples/dll-app-and-vendor/0-vendor/webpack.config.js
+++ b/examples/dll-app-and-vendor/0-vendor/webpack.config.js
@@ -2,7 +2,7 @@ var path = require("path");
 var webpack = require("../../../");
 
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	context: __dirname,
 	entry: ["example-vendor"],
 	output: {
diff --git a/examples/dll-user/README.md b/examples/dll-user/README.md
index 3b7937fd2ba..0ca2eaa94a2 100644
--- a/examples/dll-user/README.md
+++ b/examples/dll-user/README.md
@@ -10,7 +10,7 @@ This is the _user_ bundle, which uses the manifest from [dll-reference example](
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	plugins: [
 		new webpack.DllReferencePlugin({
 			context: path.join(__dirname, "..", "dll"),
diff --git a/examples/dll-user/webpack.config.js b/examples/dll-user/webpack.config.js
index 7d058b6d535..c8d0d5210ad 100644
--- a/examples/dll-user/webpack.config.js
+++ b/examples/dll-user/webpack.config.js
@@ -1,7 +1,7 @@
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	plugins: [
 		new webpack.DllReferencePlugin({
 			context: path.join(__dirname, "..", "dll"),
diff --git a/examples/dll/README.md b/examples/dll/README.md
index 056b9c6e7fd..fb673d48888 100644
--- a/examples/dll/README.md
+++ b/examples/dll/README.md
@@ -10,7 +10,7 @@ This is the _reference_ bundle (with the manifests) for [dll user example](https
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	resolve: {
 		extensions: [".js", ".jsx"]
 	},
diff --git a/examples/dll/webpack.config.js b/examples/dll/webpack.config.js
index 8b13d6ca13d..6db3df6266c 100644
--- a/examples/dll/webpack.config.js
+++ b/examples/dll/webpack.config.js
@@ -1,7 +1,7 @@
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	resolve: {
 		extensions: [".js", ".jsx"]
 	},
diff --git a/examples/explicit-vendor-chunk/README.md b/examples/explicit-vendor-chunk/README.md
index e950d72896f..3683157c664 100644
--- a/examples/explicit-vendor-chunk/README.md
+++ b/examples/explicit-vendor-chunk/README.md
@@ -6,7 +6,7 @@ var webpack = require("../../");
 module.exports = [
 	{
 		name: "vendor",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: ["./vendor", "./vendor2"],
 		output: {
 			path: path.resolve(__dirname, "dist"),
@@ -23,7 +23,7 @@ module.exports = [
 
 	{
 		name: "app",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		dependencies: ["vendor"],
 		entry: {
 			pageA: "./pageA",
diff --git a/examples/explicit-vendor-chunk/webpack.config.js b/examples/explicit-vendor-chunk/webpack.config.js
index 621a95494a0..e2b4a2911d8 100644
--- a/examples/explicit-vendor-chunk/webpack.config.js
+++ b/examples/explicit-vendor-chunk/webpack.config.js
@@ -3,7 +3,7 @@ var webpack = require("../../");
 module.exports = [
 	{
 		name: "vendor",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: ["./vendor", "./vendor2"],
 		output: {
 			path: path.resolve(__dirname, "dist"),
@@ -20,7 +20,7 @@ module.exports = [
 
 	{
 		name: "app",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		dependencies: ["vendor"],
 		entry: {
 			pageA: "./pageA",
diff --git a/examples/externals/README.md b/examples/externals/README.md
index fb7ce0a4b41..6c22cd52992 100644
--- a/examples/externals/README.md
+++ b/examples/externals/README.md
@@ -28,7 +28,7 @@ exports.exampleValue = subtract(add(42, 2), 2);
 
 ```javascript
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	output: {
 		libraryTarget: "umd"
 	},
diff --git a/examples/externals/webpack.config.js b/examples/externals/webpack.config.js
index 8210f6627a5..6a9400effbd 100644
--- a/examples/externals/webpack.config.js
+++ b/examples/externals/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	output: {
 		libraryTarget: "umd"
 	},
diff --git a/examples/extra-async-chunk-advanced/README.md b/examples/extra-async-chunk-advanced/README.md
index 5efbc1aacf7..ef6f66d7857 100644
--- a/examples/extra-async-chunk-advanced/README.md
+++ b/examples/extra-async-chunk-advanced/README.md
@@ -23,7 +23,7 @@ require.ensure(["./a", "./e"], function(require) {
 
 ```javascript
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	optimization: {
 		splitChunks: {
 			minSize: 0 // This example is too small
diff --git a/examples/extra-async-chunk-advanced/webpack.config.js b/examples/extra-async-chunk-advanced/webpack.config.js
index f256bc78706..bf11207f017 100644
--- a/examples/extra-async-chunk-advanced/webpack.config.js
+++ b/examples/extra-async-chunk-advanced/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	optimization: {
 		splitChunks: {
 			minSize: 0 // This example is too small
diff --git a/examples/extra-async-chunk/webpack.config.js b/examples/extra-async-chunk/webpack.config.js
index f256bc78706..bf11207f017 100644
--- a/examples/extra-async-chunk/webpack.config.js
+++ b/examples/extra-async-chunk/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	optimization: {
 		splitChunks: {
 			minSize: 0 // This example is too small
diff --git a/examples/harmony-library/README.md b/examples/harmony-library/README.md
index 200a873cc00..3cd76f2032d 100644
--- a/examples/harmony-library/README.md
+++ b/examples/harmony-library/README.md
@@ -3,7 +3,7 @@
 ```javascript
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: "./example",
 	output: {
 		path: path.join(__dirname, "dist"),
diff --git a/examples/harmony-library/webpack.config.js b/examples/harmony-library/webpack.config.js
index 5700c38ed4b..a88f40e0fc9 100644
--- a/examples/harmony-library/webpack.config.js
+++ b/examples/harmony-library/webpack.config.js
@@ -1,6 +1,6 @@
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: "./example",
 	output: {
 		path: path.join(__dirname, "dist"),
diff --git a/examples/harmony-unused/webpack.config.js b/examples/harmony-unused/webpack.config.js
index 1aa1e0e591c..f370f58a23b 100644
--- a/examples/harmony-unused/webpack.config.js
+++ b/examples/harmony-unused/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	optimization: {
 		concatenateModules: false
 	}
diff --git a/examples/http2-aggressive-splitting/README.md b/examples/http2-aggressive-splitting/README.md
index ed36d015293..c6ee2ff2234 100644
--- a/examples/http2-aggressive-splitting/README.md
+++ b/examples/http2-aggressive-splitting/README.md
@@ -20,7 +20,7 @@ The backward compatibility (non-HTTP2 client) improves with bigger `maxSize`, as
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	cache: true, // better performance for the AggressiveSplittingPlugin
 	entry: "./example",
 	output: {
diff --git a/examples/http2-aggressive-splitting/webpack.config.js b/examples/http2-aggressive-splitting/webpack.config.js
index 5150993a1b2..ae4ddd0538b 100644
--- a/examples/http2-aggressive-splitting/webpack.config.js
+++ b/examples/http2-aggressive-splitting/webpack.config.js
@@ -1,7 +1,7 @@
 var path = require("path");
 var webpack = require("../../");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	cache: true, // better performance for the AggressiveSplittingPlugin
 	entry: "./example",
 	output: {
diff --git a/examples/hybrid-routing/README.md b/examples/hybrid-routing/README.md
index 70b36a2ec46..a2894268521 100644
--- a/examples/hybrid-routing/README.md
+++ b/examples/hybrid-routing/README.md
@@ -3,7 +3,7 @@
 ```javascript
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		// The entry points for the pages
 		// They also contains router
diff --git a/examples/hybrid-routing/webpack.config.js b/examples/hybrid-routing/webpack.config.js
index f3e69bbd346..73a3e850c38 100644
--- a/examples/hybrid-routing/webpack.config.js
+++ b/examples/hybrid-routing/webpack.config.js
@@ -1,6 +1,6 @@
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		// The entry points for the pages
 		// They also contains router
diff --git a/examples/loader/webpack.config.js b/examples/loader/webpack.config.js
index 73f1713f0e0..b6d7cd8b90c 100644
--- a/examples/loader/webpack.config.js
+++ b/examples/loader/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	module: {
 		rules: [
 			{
diff --git a/examples/many-pages/README.md b/examples/many-pages/README.md
index 61c13962dbd..7a69d80b58c 100644
--- a/examples/many-pages/README.md
+++ b/examples/many-pages/README.md
@@ -26,7 +26,7 @@ Note: decreasing `maxInitial/AsyncRequest` will increase duplication further to
 
 ```
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		pageA: "./pages/a",
 		pageB: "./pages/b",
diff --git a/examples/many-pages/webpack.config.js b/examples/many-pages/webpack.config.js
index b5ce749f624..72b9ab5cdf1 100644
--- a/examples/many-pages/webpack.config.js
+++ b/examples/many-pages/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		pageA: "./pages/a",
 		pageB: "./pages/b",
diff --git a/examples/multi-compiler/README.md b/examples/multi-compiler/README.md
index 530e4ef4ec6..399f74df5a1 100644
--- a/examples/multi-compiler/README.md
+++ b/examples/multi-compiler/README.md
@@ -15,7 +15,7 @@ var webpack = require("../../");
 module.exports = [
 	{
 		name: "mobile",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: "./example",
 		output: {
 			path: path.join(__dirname, "dist"),
@@ -30,7 +30,7 @@ module.exports = [
 
 	{
 		name: "desktop",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: "./example",
 		output: {
 			path: path.join(__dirname, "dist"),
diff --git a/examples/multi-compiler/webpack.config.js b/examples/multi-compiler/webpack.config.js
index 4fc3088639a..369cfa0c0b9 100644
--- a/examples/multi-compiler/webpack.config.js
+++ b/examples/multi-compiler/webpack.config.js
@@ -3,7 +3,7 @@ var webpack = require("../../");
 module.exports = [
 	{
 		name: "mobile",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: "./example",
 		output: {
 			path: path.join(__dirname, "dist"),
@@ -18,7 +18,7 @@ module.exports = [
 
 	{
 		name: "desktop",
-		// mode: "development || "production",
+		// mode: "development" || "production",
 		entry: "./example",
 		output: {
 			path: path.join(__dirname, "dist"),
diff --git a/examples/multi-part-library/README.md b/examples/multi-part-library/README.md
index 393e854c01d..988d6653fcc 100644
--- a/examples/multi-part-library/README.md
+++ b/examples/multi-part-library/README.md
@@ -17,7 +17,7 @@ Note: When your library has dependencies that should not be included in the comp
 ```javascript
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		alpha: "./alpha",
 		beta: "./beta"
diff --git a/examples/multi-part-library/webpack.config.js b/examples/multi-part-library/webpack.config.js
index f79be11fe71..47537625b61 100644
--- a/examples/multi-part-library/webpack.config.js
+++ b/examples/multi-part-library/webpack.config.js
@@ -1,6 +1,6 @@
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		alpha: "./alpha",
 		beta: "./beta"
diff --git a/examples/multiple-entry-points/README.md b/examples/multiple-entry-points/README.md
index 0d49ec5ce9b..e371212c5bc 100644
--- a/examples/multiple-entry-points/README.md
+++ b/examples/multiple-entry-points/README.md
@@ -51,7 +51,7 @@ require.ensure(["./shared"], function(require) {
 
 ```javascript
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		pageA: "./pageA",
 		pageB: "./pageB"
diff --git a/examples/multiple-entry-points/webpack.config.js b/examples/multiple-entry-points/webpack.config.js
index 4df8e07d565..a4fdc01c909 100644
--- a/examples/multiple-entry-points/webpack.config.js
+++ b/examples/multiple-entry-points/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		pageA: "./pageA",
 		pageB: "./pageB"
diff --git a/examples/two-explicit-vendor-chunks/README.md b/examples/two-explicit-vendor-chunks/README.md
index ac68dea231f..523bac6b4bf 100644
--- a/examples/two-explicit-vendor-chunks/README.md
+++ b/examples/two-explicit-vendor-chunks/README.md
@@ -3,7 +3,7 @@
 ```javascript
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		vendor1: ["./vendor1"],
 		vendor2: ["./vendor2"],
diff --git a/examples/two-explicit-vendor-chunks/webpack.config.js b/examples/two-explicit-vendor-chunks/webpack.config.js
index 582fdd0dbb2..68a018fbfbd 100644
--- a/examples/two-explicit-vendor-chunks/webpack.config.js
+++ b/examples/two-explicit-vendor-chunks/webpack.config.js
@@ -1,6 +1,6 @@
 var path = require("path");
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	entry: {
 		vendor1: ["./vendor1"],
 		vendor2: ["./vendor2"],
diff --git a/examples/wasm-complex/webpack.config.js b/examples/wasm-complex/webpack.config.js
index ee188b60683..13de5cdac2f 100644
--- a/examples/wasm-complex/webpack.config.js
+++ b/examples/wasm-complex/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	output: {
 		publicPath: "dist/"
 	},
diff --git a/examples/wasm-simple/webpack.config.js b/examples/wasm-simple/webpack.config.js
index 70ba131d8c3..990ea91fc6f 100644
--- a/examples/wasm-simple/webpack.config.js
+++ b/examples/wasm-simple/webpack.config.js
@@ -1,5 +1,5 @@
 module.exports = {
-	// mode: "development || "production",
+	// mode: "development" || "production",
 	output: {
 		webassemblyModuleFilename: "[hash].wasm",
 		publicPath: "dist/"