Use simple forms to create attributions in examples

examples/localized-openstreetmap.js

@@ -9,10 +9,7 @@ goog.require('ol.source.OSM');
 var openCycleMapLayer = new ol.layer.Tile({
   source: new ol.source.OSM({
     attributions: [
-      new ol.Attribution({
-        html: 'All maps © ' +
-            '<a href="http://www.opencyclemap.org/">OpenCycleMap</a>'
-      }),
+      'All maps © <a href="http://www.opencyclemap.org/">OpenCycleMap</a>',
       ol.source.OSM.ATTRIBUTION
     ],
     url: 'http://{a-c}.tile.opencyclemap.org/cycle/{z}/{x}/{y}.png'
@@ -22,10 +19,7 @@ var openCycleMapLayer = new ol.layer.Tile({
 var openSeaMapLayer = new ol.layer.Tile({
   source: new ol.source.OSM({
     attributions: [
-      new ol.Attribution({
-        html: 'All maps &copy; ' +
-            '<a href="http://www.openseamap.org/">OpenSeaMap</a>'
-      }),
+      'All maps © <a href="http://www.openseamap.org/">OpenSeaMap</a>',
       ol.source.OSM.ATTRIBUTION
     ],
     opaque: false,