minor cleanup

src/atrule/function.rs

@@ -183,6 +183,7 @@ impl Function {
                     }
                 }
                 Stmt::AtRule(AtRule::Each(..)) => todo!("@each in @function"),
+                // todo: multiline comments
                 _ => return Err(("This at-rule is not allowed here.", stmt.span).into()),
             }
         }

tests/selectors.rs

@@ -512,9 +512,9 @@ test!(
     "\\61 {\n    color: red;\n}\n",
     "a {\n  color: red;\n}\n"
 );
-/// this checks for a bug in which the selector
-/// contents get longer as a result of interpolation,
-/// which interferes with span information.
+// this checks for a bug in which the selector
+// contents get longer as a result of interpolation,
+// which interferes with span information.
 test!(
     selector_span_gets_larger,
     "$a: aaaaaaaaaaa;\n\n#{$a} {\n    color: foo;\n}\n",