Html Engine not preserve newlines

[kirsan31]

Code:

        static void Main(string[] args)
        {
            var highlighter = new Highlighter(new HtmlEngine());
            var s = @"        static void Main(string[] args)
        {
            var highlighter = new Highlighter(new HtmlEngine());
            var s = @"";
            var highlightedCode = highlighter.Highlight(""C#"", s);
            Console.Write(highlightedCode);
            Console.ReadKey();
        }";
            var highlightedCode = highlighter.Highlight("C#", s);
            Console.Write(highlightedCode);
            Console.ReadKey();
        }

output:

<span style="color: Black;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">        <span style="color: Blue;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">static</span> <span style="color: Blue;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">void</span> Main(<span style="color: Blue;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">string</span>[] args)
        {
            var highlighter <span style="color: Red;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">=</span> <span style="color: Blue;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">new</span> Highlighter(<span style="color: Blue;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">new</span> HtmlEngine());
            var s <span style="color: Red;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">=</span> <span style="color: #666666;background-color: Transparent;font-family: Courier New;font-size: 11px;font-weight: normal;">@&quot;;
            var highlightedCode = highlighter.Highlight(&quot;</span>C#&quot;, s);
            Console.Write(highlightedCode);
            Console.ReadKey();
        }</span>

result:

[thomasjo]

The output of the HTML engine is intended to be placed within <pre>...</pre> tags.

Sadly I haven't touched this code for several years, and what little documentation used to exist at my blog is long gone by now. I'll happily merge any PR that improves the (lack of) documentation.