Entrance locations explanations

core/views/caves.py

@@ -477,7 +477,8 @@ def edit_entrance(request, path="", caveslug=None, entslug=None):
             cave_file = cave.file_output()
             write_and_commit([entrance_file, cave_file], f"Online edit of entrance {entrance.slug}")
             return HttpResponseRedirect("/" + cave.url)
-    else:
+            
+    else: # GET the page, not POST, or if either of the forms were invalid when POSTed
         if entrance:
             # re-read entrance data from file.
             filename = str(entrance.slug +".html")