edge case in which @ include had no args AND no semicolon

src/atrule/mixin.rs

@@ -199,11 +199,16 @@ pub(crate) fn eat_include<I: Iterator<Item = Token>>(
             '(' => {
                 let tmp = eat_call_args(toks)?;
                 devour_whitespace_or_comment(toks)?;
-                if let Some(tok) = toks.next() {
+                if let Some(tok) = toks.peek() {
                     match tok.kind {
-                        ';' => {}
-                        '{' => has_content = true,
-                        _ => todo!(),
+                        ';' => {
+                            toks.next();
+                        }
+                        '{' => {
+                            toks.next();
+                            has_content = true
+                        }
+                        _ => {}
                     }
                 }
                 tmp

tests/mixins.rs

@@ -233,3 +233,8 @@ error!(
     undefined_mixin,
     "a {@include foo;}", "Error: Undefined mixin."
 );
+test!(
+    include_empty_args_no_semicolon,
+    "@mixin c {}\n\na {\n    @include c()\n}\n",
+    ""
+);