Remove trailing and leading slashes off the $url for Breadcrumb gen;

so that no empty values remain in []interface

fixes: #331

layouts/partials/breadcrumbs.html

@@ -1,6 +1,7 @@
 {{- if (.Param "ShowBreadCrumbs")}}
 <div class="breadcrumbs">
     {{- $url := replace .Parent.Permalink ( printf "%s" .Site.BaseURL) "" }}
+    {{- $url = (trim $url "/" ) }}
     {{- $lang_url := strings.TrimPrefix ( printf "%s/" .Lang) $url }}
 
     <a href="{{ "" | absLangURL }}">{{ i18n "home" | default "Home"}}</a>

layouts/partials/templates/schema_json.html

@@ -19,6 +19,7 @@
 {{- else if (or .IsPage .IsSection) }}
 {{/* BreadcrumbList */}}
 {{- $url := replace .Parent.Permalink ( printf "%s" .Site.BaseURL) "" }}
+{{- $url = (trim $url "/" ) }}
 {{- $lang_url := strings.TrimPrefix ( printf "%s/" .Lang) $url }}
 {{- $bc_list := (split $lang_url "/")}}