Don't concatenate the root album name to be 100% compatible with existing version for flat albums

src/model/album.js

@@ -42,7 +42,8 @@ Album.prototype.finalize = function(options) {
   // finalize all nested albums first (recursive)
   // and set a nested filename
   for (var i = 0; i < this.albums.length; ++i) {
-    this.albums[i].filename = this.filename + '-' + this.albums[i].filename;
+    var prefix = this.home ? '' : (this.filename + '-');
+    this.albums[i].filename = prefix + this.albums[i].filename;
     this.albums[i].depth = this.depth + 1;
     this.albums[i].finalize();
   }

test/model/album.spec.js

@@ -62,6 +62,31 @@ describe('Album', function() {
 
     describe('nested albums', function() {
 
+      it('concatenates the titles for uniqueness', function() {
+        // to avoid having two nested albums called "October" overwrite each other
+        // note: doesn't use the root title to avoid "home-" or "index-"
+        var root = new Album({
+          title: 'home',
+          albums: [
+            new Album({
+              title: '2010',
+              albums: [
+                new Album({title: 'October'})
+              ]
+            }),
+            new Album({
+              title: '2011',
+              albums: [
+                new Album({title: 'October'})
+              ]
+            }),
+          ]
+        });
+        root.finalize();
+        should(root.albums[0].albums[0].filename).eql('2010-October');
+        should(root.albums[1].albums[0].filename).eql('2011-October');
+      });
+
       it('calculates the depth of every album', function() {
         var a = new Album('single');
         var b = new Album('single');