Issue #1793: Backbone.history.navigate should use this.getFragment instead of fragment to avoid routes getting triggered twice

backbone.js

@@ -1167,7 +1167,7 @@
       } else {
         return this.location.assign(url);
       }
-      if (options.trigger) this.loadUrl(fragment);
+      if (options.trigger) this.loadUrl(this.getFragment() || fragment);
     },
 
     // Update the hash location, either replacing the current entry, or adding

test/router.js

@@ -492,4 +492,59 @@ $(document).ready(function() {
     new Router;
   });
 
+  test("#1793 Trailing spaces (pushState:false).", 1, function() {
+    var count = 0;
+
+    Backbone.history.stop();
+
+    // restart History with pushState:false
+    Backbone.history.start({
+      pushState: false
+    });
+
+    router.on("route:search", function(page) {
+      count = count + 1;
+    });
+
+    // navigate to the search route with trailing space in the query string
+    Backbone.history.navigate('search/space ', {trigger: true});
+
+    // manually fire checkUrl
+    Backbone.history.checkUrl();
+
+    equal(count, 1); // route event should be fired once
+
+    router.off("route:search"); //unbind events
+  });
+
+  test("#1793 Trailing spaces using browser location (pushState: false).", 1, function() {
+    var count = 0;
+
+    Backbone.history.stop();
+    Backbone.history.location = window.location; // Use browser location
+
+    // restart History with pushState:false
+    Backbone.history.start({
+      pushState: false
+    });
+
+    router.on("route:search", function(page) {
+      count = count + 1;
+    });
+
+    // navigate to the search route with trailing space in the query string
+    Backbone.history.navigate('search/space ', {trigger: true});
+
+    // manually fire checkUrl
+    Backbone.history.checkUrl();
+
+    equal(count, 1); // route event should be fired only once
+
+    router.off("route:search"); //unbind events
+
+    // restore location hash
+    window.location.hash = '';
+
+  });
+
 });