Add the data-noescape attribute and example
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@ -582,15 +582,15 @@ Reveal.addEventListener( 'fragmenthidden', function( event ) {
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### Code syntax highlighting
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By default, Reveal is configured with [highlight.js](http://softwaremaniacs.org/soft/highlight/en/) for code syntax highlighting. Below is an example with clojure code that will be syntax highlighted. When the `data-trim` attribute is present surrounding whitespace is automatically removed.
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By default, Reveal is configured with [highlight.js](http://softwaremaniacs.org/soft/highlight/en/) for code syntax highlighting. Below is an example with clojure code that will be syntax highlighted. When the `data-trim` attribute is present, surrounding whitespace is automatically removed. HTML will be escaped by default. To avoid this, for example if you are using `<mark>` to call out a line of code, add the `data-noescape` attribute to the `<code>` element.
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```html
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<section>
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<pre><code data-trim>
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<pre><code data-trim data-noescape>
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(def lazy-fib
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(concat
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[0 1]
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((fn rfib [a b]
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<mark>((fn rfib [a b]</mark>
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(lazy-cons (+ a b) (rfib b (+ a b)))) 0 1)))
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</code></pre>
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</section>
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