Stop rendering text inside flex boxes.

sky/tests/lowlevel/home.sky

Index: sky/tests/lowlevel/home.sky
diff --git a/sky/tests/lowlevel/home.sky b/sky/tests/lowlevel/home.sky
index c89f9d3dcecbdec6931ea74e2fa9235eb6f1ccc1..d7c6d49fc536df054b5bb48c00ccf874af6da868 100644
--- a/sky/tests/lowlevel/home.sky
+++ b/sky/tests/lowlevel/home.sky
@@ -1,7 +1,8 @@
 <div>
 <style>
- .h1 { font-size: 2em; margin: 1em; }
- .p { margin: 0.5em 1em; color: #bcd8f5; font-weight: 900; }
+  .h1, .p { display: paragraph; }
+  .h1 { font-size: 2em; margin: 1em; }
+  .p { margin: 0.5em 1em; color: #bcd8f5; font-weight: 900; }
 </style>
 <div class="h1">about:blank</div>
 <div class="p">Welcome to Sky!</div>
@@ -12,7 +13,7 @@ import "dart:sky.internals" as internals;
 // Don't use dump-as-render-tree.sky, we want a test with no imports.
 void main() {
   sky.window.addEventListener('load', (_) =>
-    internals.notifyTestComplete(internals.renderTreeAsText()));  
+    internals.notifyTestComplete(internals.renderTreeAsText()));
 }
 </script>
 </div>