Not having a space delimiter between attribute name and its value actually improves the readability, as it visually shows the coupling between these. Here's an example.
No spaces delimiter:
<link rel="stylesheet" type="text/css" href="/css/screen-iphone.css" title="My Site" media="only screen and (max-device-width: 480px)" />
Space delimiter:
<link rel = "stylesheet" type = "text/css" href = "/css/screen-iphone.css" title = "My Site" media = "only screen and (max-device-width: 480px)" />
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