update elements and fix some bugs

lib/src/prism/tests/languages/css/selector_feature.test

Index: lib/src/prism/tests/languages/css/selector_feature.test
diff --git a/lib/src/prism/tests/languages/css/selector_feature.test b/lib/src/prism/tests/languages/css/selector_feature.test
new file mode 100644
index 0000000000000000000000000000000000000000..5a5972013529c02f703f425d75db3a89549540a6
--- /dev/null
+++ b/lib/src/prism/tests/languages/css/selector_feature.test
@@ -0,0 +1,25 @@
+foo{
+foo + bar {
+foo:first-child:hover {
+* {
+foo,
+bar{
+
+----------------------------------------------------
+
+[
+	["selector", "foo"],
+	["punctuation", "{"],
+	["selector", "foo + bar"],
+	["punctuation", "{"],
+	["selector", "foo:first-child:hover"],
+	["punctuation", "{"],
+	["selector", "*"],
+	["punctuation", "{"],
+	["selector", "foo,\r\nbar"],
+	["punctuation", "{"]
+]
+
+----------------------------------------------------
+
+Checks for single-line and multi-line selectors.