LayoutTests/inspector/formatting/resources/html-tests/attributes.html

<p></p>
<p  ></p>
<p attr></p>
<p attr ></p>
<p attr=></p>
<p attr=value></p>
<p attr=value ></p>
<p attr=""></p>
<p attr="value"></p>
<p attr="value 1 2 3"></p>
<p attr= "value" ></p>
<p attr=''></p>
<p attr='value'></p>
<p attr= 'value' ></p>
<p attr= 'value 1 2 3' ></p>
<p attr=value1 attr=value2></p>
<p a=1 b=2></p>

<p
a
=
1
b
=
2
>
</p>

<!-- Invalid -->
<p "value"></p>
<p 1></p>
</p attr="value">