Test cases breaking parser

[dmsnell]

li + a {
  color: red; 
}

li > a {
  color: red; 
}

[samouri]

Hi @dmsnell! Thank you for testing out the parser and noticing this error. I've currently only got about 20% of the CSS spec working. I've still got a long way to go.

I'll leave this issue open until I handle these two cases.

[vjeux]

If you are interested in many test cases, you can take a look at prettier tests in the css_ folders.