Remove trailing whitespace

components/selectors/parser.rs

@@ -2064,7 +2064,6 @@ pub mod tests {
             ), (1 << 20) + (1 << 10) + (0 << 0))
         ))));
         parser.default_ns = None;
-
         assert!(parse(":not(#provel.old)").is_err());
         assert!(parse(":not(#provel > old)").is_err());
         assert!(parse("table[rules]:not([rules=\"none\"]):not([rules=\"\"])").is_ok());