Ignore leading and trailing white space inside certain or all attributes?

[lonewarrior556]

I am having issues since these elements are not considered equivalent?

<div style=" "></div>
<div style=""></div>

<div style="color:red "></div>
<div style="color:red"></div>

<div style=" color:red"></div>
<div style="color:red"></div>

<div style=" color:red "></div>
<div style="color:red"></div>

[mordrax]

I'd like to add that

<div style=""></div>

and

<div></div>

should also be equivalent.