vendor/test/cases/regression.212.css in stylus-source-0.18.0 vs vendor/test/cases/regression.212.css in stylus-source-0.19.0

@@ -1,15 +1,15 @@
 button {
   intensity: 1;
   background: #eee;
-  glow: "glow";
+  glow: 'glow';
 }
 button {
   intensity: 0.5;
   background: #333;
-  glow: "glow";
+  glow: 'glow';
 }
 button {
   intensity: 0.5;
   background: #000;
-  glow: "glow";
+  glow: 'glow';
 }
\ No newline at end of file