Edited Issue: Tilde slash feature not work properly if has any space near equal sign [1196]

Don't sure that this problem had been reported before
but I can't not find it in issue list.

I've found that ASP.NET MVC 4 / Razor 2's new tilde slash (~/) feature
stop working if has space around equal sign (=).

This behavior is so strange in my opinion.
Is this should be improved or fixed?
or just by design behavior?

Thanks.

The example code: Index.cshtml
```
@{
ViewBag.Title = "Index";
}

<h2>Index</h2>

<img src="~/Images/keyboard.png" />
<hr />
<img src= "~/Images/keyboard.png" />
<hr />
<img src ="~/Images/keyboard.png" />
<hr />
<img src = "~/Images/keyboard.png" />
<hr />

```

and output result: