Tests that edited stylesheets appear properly.

[expanded] 
element.style { ()

[expanded] 
.rule4 { (<style>)
    color: white;

[expanded] 
.rule2 { (<style>)
/-- overloaded --/     color: yellow;

[expanded] 
.rule1 { (<style>)
/-- overloaded --/     color: green;

[expanded] 
.rule0 { (<style>)
/-- overloaded --/     color: black;

[expanded] 
div { (user agent stylesheet)
    display: block;
    unicode-bidi: isolate;