More complicated mixin test.

spec/basic/17_basic_mixins/input.scss

@@ -8,6 +8,14 @@
 
 @mixin hux() {
   no: parameters here;
+  div, span {
+    some: nested stuff;
+    foo, bar {
+      more: stuff and so forth;
+      blah: blah;
+    }
+  }
+  /* end of hux */
 }
 
 a {

spec/basic/17_basic_mixins/output.css

@@ -5,8 +5,14 @@ a {
   hugabug: kwd-y kwd-x;
   goo: boo hoo;
   no: parameters here;
+  /* end of hux */
   flugablug: pug flug glug;
   flugablug: pug mug glug; }
+  a div, a span {
+    some: nested stuff; }
+    a div foo, a div bar, a span foo, a span bar {
+      more: stuff and so forth;
+      blah: blah; }
 
 div {
   blah: blah from a variable blah; }