Remove the behaviour of Remove initial line feed plugin (remove by de…

…fault, allow to keep with a CSS class)

plugins/remove-initial-line-feed/index.html

@@ -26,7 +26,8 @@ <h2>Remove initial line feed</h2>
 	<h1>How to use</h1>
 
 	<p>Obviously, this is supposed to work only for code blocks (<code>&lt;pre>&lt;code></code>) and not for inline code.</p>
-	<p>Add class <strong>remove-initial-line-feed</strong> to your desired <code>&lt;pre></code>.</p>
+	<p>With this plugin included, any initial line feed will be removed by default.</p>
+	<p>To bypass this behaviour, you may add the class <strong>keep-initial-line-feed</strong> to your desired <code>&lt;pre></code>.</p>
 </section>
 
 <section>
@@ -38,7 +39,7 @@ <h2>Without adding the class</h2>
 </code></pre>
 
 	<h2>With the class added</h2>
-	<pre class="language-markup remove-initial-line-feed"><code>
+	<pre class="language-markup keep-initial-line-feed"><code>
 &lt;div>&lt;/div>
 </code></pre>
 

plugins/remove-initial-line-feed/prism-remove-initial-line-feed.js

@@ -1,11 +1,11 @@
 Prism.hooks.add('before-highlight', function(env) {
 	if (env.code) {
 		var pre = env.element.parentNode;
-		var clsReg = /\s*\bremove-initial-line-feed\b\s*/;
+		var clsReg = /\s*\bkeep-initial-line-feed\b\s*/;
 		if (
 			pre && pre.nodeName.toLowerCase() === 'pre' &&
-			// Apply only if the <pre> or the <code> have the class
-			(clsReg.test(pre.className) || clsReg.test(env.element.className))
+			// Apply only if nor the <pre> or the <code> have the class
+			(!clsReg.test(pre.className) && !clsReg.test(env.element.className))
 		) {
 			env.code = env.code.replace(/^(?:\r?\n|\r)/, '');
 		}