manager: display LDAP configuration as JSON (#68286)

src/authentic2/manager/templates/authentic2/manager/ldap_details.html

@@ -17,5 +17,5 @@
 </div>
 {% endif %}
 <h5>{% trans "Configuration:" %}</h5>
-<pre>{{ ldap.block|pprint }}</pre>
+<pre>{{ ldap.block }}</pre>
 </div>

src/authentic2/manager/views.py

@@ -693,7 +693,7 @@ class TechnicalInformationView(TitleMixin, MediaMixin, TemplateView):
                 config['error'] = True
                 config['errmsg'] = str(e)
             else:
-                config['block'] = block  # keep unmodified block for display
+                config['block'] = json.dumps(block, indent=2, ensure_ascii=False)
                 # retrieve ldap uri, not directly visible in configuration block
                 config['ldap_uri'] = conn.get_option(ldap.OPT_URI)
                 # user filters need to be formatted to ldapsearch syntax