correctly parse styles after @supports and unknown at rules

src/parse/mod.rs

@@ -546,7 +546,7 @@ impl<'a> Parser<'a> {
             params.push(tok.kind);
         }
 
-        let raw_body = self.parse()?;
+        let raw_body = self.parse_stmt()?;
         let mut rules = Vec::with_capacity(raw_body.len());
         let mut body = Vec::new();
 
@@ -782,7 +782,7 @@ impl<'a> Parser<'a> {
             extender: self.extender,
             content_scopes: self.content_scopes,
         }
-        .parse()?;
+        .parse_stmt()?;
 
         let mut rules = Vec::with_capacity(raw_body.len());
         let mut body = Vec::new();

tests/supports.rs

@@ -0,0 +1,18 @@
+#![cfg(test)]
+
+#[macro_use]
+mod macros;
+
+test!(
+    style_following,
+    "@supports (a: b) {
+        a {
+            color: red;
+        }
+    }
+
+    a {
+        color: green;
+    }",
+    "@supports (a: b) {\n  a {\n    color: red;\n  }\n}\na {\n  color: green;\n}\n"
+);

tests/unknown-at-rule.rs

@@ -16,3 +16,16 @@ test!(
     "@false;\n"
 );
 test!(nothing_after_hash, "@foo #", "@foo #;\n");
+test!(
+    style_following,
+    "@foo (a: b) {
+        a {
+            color: red;
+        }
+    }
+
+    a {
+        color: green;
+    }",
+    "@foo (a: b) {\n  a {\n    color: red;\n  }\n}\na {\n  color: green;\n}\n"
+);