Css don't have line comments

I.e. `//` does not mark that the rest of the line is a comment in css.

rsass/src/parser/css/media.rs

@@ -1,5 +1,5 @@
-use super::super::util::{ignore_comments, opt_spacelike, spacelike};
-use super::{strings, values, PResult, Span};
+use super::super::util::ignore_comments;
+use super::{opt_spacelike, spacelike, strings, values, PResult, Span};
 use crate::css::{MediaArgs, Value};
 use crate::value::{ListSeparator, Operator};
 use nom::branch::alt;

rsass/src/parser/css/mod.rs

@@ -3,11 +3,11 @@ mod rule;
 pub(crate) mod strings;
 mod values;
 
-use super::util::{opt_spacelike, spacelike};
 use super::{PResult, Span};
 use crate::css::{AtRule, Comment, Import, Item, MediaRule, Value};
 use nom::branch::alt;
 use nom::bytes::complete::{is_not, tag, tag_no_case};
+use nom::character::complete::{multispace0, multispace1};
 use nom::combinator::{
     all_consuming, into, map, map_res, not, opt, peek, recognize,
 };
@@ -146,3 +146,11 @@ pub fn comment2(input: Span) -> PResult<String> {
         tag("*/"),
     )(input)
 }
+
+pub fn spacelike(input: Span) -> PResult<()> {
+    map(multispace1, |_| ())(input)
+}
+
+pub fn opt_spacelike(input: Span) -> PResult<()> {
+    map(multispace0, |_| ())(input)
+}

rsass/src/parser/css/rule.rs

@@ -1,5 +1,5 @@
-use super::super::util::opt_spacelike;
 use super::super::{PResult, Span};
+use super::opt_spacelike;
 use super::strings::custom_value;
 use super::{comment, import2, strings, values};
 use crate::css::parser::selector_set;

rsass/src/parser/css/strings.rs

@@ -1,6 +1,6 @@
 use super::super::{input_to_str, input_to_string, PResult, Span};
+use super::opt_spacelike;
 use crate::css::CssString;
-use crate::parser::util::opt_spacelike;
 use crate::value::Quotes;
 use nom::branch::alt;
 use nom::bytes::complete::{is_not, tag, take};

rsass/tests/spec/css/plain/error/statement/silent_comment.rs

@@ -8,7 +8,7 @@ fn runner() -> crate::TestRunner {
 }
 
 #[test]
-#[ignore] // missing error
+#[ignore] // wrong error
 fn test() {
     assert_eq!(
         runner().err("@use \'plain\'\n"),