Trim contents of `code()` helper
Trim contents of `code()` helper

This removes arbitrary indentation from affecting the `<pre>` ouput:

    {{#code}}
        var foo = 'foo',
            bar = 'bar';
    {{/code}}

    Renders as the following HTML:

    <pre>var foo = 'foo',
        bar = 'bar';</pre>

This is what you want went rendering code samples.

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