tidy trailing slash everywhere & fix tests

settings.py

@@ -113,7 +113,7 @@ FORM_RENDERER = "django.forms.renderers.TemplatesSetting"  # Required to customi
 # see https://docs.djangoproject.com/en/dev/topics/http/middleware/#upgrading-pre-django-1-10-style-middleware
 # Seriously, read this: https://www.webforefront.com/django/middlewaredjango.html which is MUCH BETTER than the docs
 
-# We are NOT using the home-built SmartAppendSlashMiddleware
+# We are NOT using the home-built TroggleAppendSlashMiddleware, NOR are we using the Django system append_slash
 MIDDLEWARE = [
     #'django.middleware.security.SecurityMiddleware', # SECURE_SSL_REDIRECT and SECURE_SSL_HOST # we don't use this
     "django.middleware.gzip.GZipMiddleware",  # not needed when expofiles and photos served by apache
@@ -128,11 +128,12 @@ MIDDLEWARE = [
     #"troggle.core.middleware.TroggleAppendSlashMiddleware", # modified Feb.2025
 ]
 
-WSGI_APPLICATION = "troggle.wsgi.application"  # change to asgi as soon as we upgrade to Django 3.0
+WSGI_APPLICATION = "troggle.wsgi.application"  # change to asgi as soon as we upgrade to Django 5 ?
 # Append slash can't work if we have a universal catchall URL rule, and we do because all the handbook files
 # do not have simple prefix. This is why we used to have an /expoweb/ prefix for everything in the website.
-# APPEND_SLASH = True # using django.middleware.common.CommonMiddleware. Pointless, never happens if there is a catchall.
-# TROGGLE_APPEND_SLASH = True # this is our middleware: see the code in troggle/core/middleware.py for why we do NOT use it.
+# Also site-media etc. 
+APPEND_SLASH = False # using django.middleware.common.CommonMiddleware which we need for other things (I think).
+
 QM_PATTERN = r"\[\[\s*[Qq][Mm]:([ABC]?)(\d{4})-(\d*)-(\d*)\]\]"
 
 # Re-enable TinyMCE when Dj upgraded to v3. Also templates/editexpopage.html