Tests the CSS highlight in sources after the Pretty print formatting.

The below should be formatted
0: - .this-line-needs-to-be-longer-than-five-hundred-symbols {
1: - }
2:   
3: + body {
4: +     background-color: lightblue;
5: + }
6:   
7: - .class {
8: -     color: red;
9: - }
10:   
11: - .class2 {
12: -     color: green;
13: -     font-style: italic;
14: - }
15:   
16: + #id {
17: +     color: blue
18: + }
19:   
20: - notUsed {
21: -     color: black
22: - }
23:   
24: - notUsed2 {
25: -     color: white
26: - }
27:   
28: - #this-line-needs-to-be-longer-than-five-hundred-symbols.this-line-needs-to-be-longer-than-five-hundred-symbols {
29: -     content: "words don\'t come easy to me, how can I find a way to make a longer line";
30: -     color: lightgoldenrodyellow;
31: -     background-color: lightgoldenrodyellow;
32: -     border-color: lightgoldenrodyellow;
33: - }
34: