Unquoted strings for readability

examples_src/canvas-tiles.html

@@ -1,7 +1,7 @@
 ---
-template: "example.html"
-title: "Canvas tiles example"
-shortdesc: "Renders tiles with coordinates for debugging."
+template: example.html
+title: Canvas tiles example
+shortdesc: Renders tiles with coordinates for debugging.
 docs: >
   <p>The black grid tiles are generated on the client with an HTML5 canvas. Note that the tile coordinates are ol3 normalized tile coordinates (origin bottom left), not
   OSM tile coordinates (origin top left).</p>