indent recursion and update comments

templates/survexscansfolders.html

@@ -2,11 +2,15 @@
 {% load wiki_markup %}
 {% load survex_markup %}
 
-{% block title %}All Survey scans folders{% endblock %}
+{% block title %}All Survey scans folders (wallets){% endblock %}
 
 {% block content %}
 
-<h3>All Survey scans folders</h3>
+<h3>All Survey scans folders (wallets)</h3>
+<p>Each wallet contains the scanned original in-cave survey notes and sketches of 
+plans and elevations. It also contains scans of centre-line survex output on which
+hand-drawn passage sections are drawn. These hand-drawn passages will eventually be 
+traced to produce Tunnel or Therion drawings and eventually the final complete cave survey.
 <table>
 <tr><th>Scans folder</th><th>Files</th><th>Survex blocks</th></tr>
 {% for survexscansfolder in survexscansfolders %}