Fix breadcrumb whitespacing

-$def with (breadcrumbs, fullpath, separator="▸", padding=" ")
+$def with (breadcrumbs, fullpath, separator="▸", padding=" ")
 $ """
 $ Render a `separator` delimited list of linkified `breadcrumbs`.
 $

     $ crumb_icon, crumb_classes = None, None
     $if isinstance(crumb_title, tuple):
         $ crumb_icon, crumb_classes, crumb_title = crumb_title
-    $ path = path + "/" + crumb_path
     $ ups = " ".join(["up"] * remaining)
     $ remaining = remaining - 1
     <span>\
     $if crumb_icon:
         <span class="crumb-icon-$crumb_icon"></span>&thinsp;\
-     <a href=$path \
+    $if path:
+        $:padding
+    $ path = path + "/" + crumb_path
+    <a href=$path \
     $if crumb_classes:
         class="$' '.join(crumb_classes)"
     rel="$ups">$:crumb_title</a>\