#169, Remove whitespaces around content in tabs, just to be safe.

layouts/shortcodes/tabs.html

@@ -6,10 +6,10 @@
 {{- range $index, $tab := .Scratch.Get $group -}}
   <input type="radio" class="hidden" name="{{ $group }}" id="{{ printf "%s-%d" $group $index }}" {{ if not $index }}checked="checked"{{ end }} />
   <label for="{{ printf "%s-%d" $group $index }}">
-    {{ $tab.Name }}
+    {{- $tab.Name -}}
   </label>
   <div class="book-tabs-content markdown-inner">
-    {{ .Content | markdownify }}
+    {{- .Content | markdownify -}}
   </div>
 {{- end -}}
 </div>