Update attribution

Author: Malvoz

src/mapml/control/AttributionButton.js

@@ -1,7 +1,7 @@
 export var AttributionButton = L.Control.extend({
 	options: {
 		position: 'bottomright',
-		prefix: '<a href="https://www.w3.org/community/maps4html/" title="W3C Maps for HTML Community Group">Maps4HTML</a> <span aria-hidden="true">|</span> <a href="https://leafletjs.com" title="A JS library for interactive maps">Leaflet</a>'
+		prefix: '<a href="https://www.w3.org/community/maps4html/">Maps for HTML Community Group</a> <span aria-hidden="true">|</span> <a href="https://leafletjs.com" title="A JS library for interactive maps">Leaflet</a>'
 	},
 
 	initialize: function (options) {

src/mapml/layers/MapLayer.js

@@ -1120,7 +1120,7 @@ export var MapMLLayer = L.Layer.extend({
         if (licenseLink) {
             licenseTitle = licenseLink.getAttribute('title');
             licenseUrl = licenseLink.getAttribute('href');
-            attText = '<a href="' + licenseUrl + '" title="'+licenseTitle+'">'+licenseTitle+'</a>';
+            attText = '<a href="' + licenseUrl + '">'+licenseTitle+'</a>';
         }
         L.setOptions(layer,{attribution:attText});
         var legendLink = xml.querySelector('map-link[rel=legend]');