make clear what filename is being saved. Phil Underwood issue.

core/views/survex.py

@@ -404,7 +404,7 @@ def svx(request, survex_file):
         if not difflist:
             difflist = ["Survex file does not exist yet"]
 
-
+    fn = str(svxfile)[11:]
     events = events_on_dates(svxblocks)
     year = year_for_svx(svxblocks)
     form.data['who_are_you'] = editor
@@ -421,6 +421,7 @@ def svx(request, survex_file):
         "logmessage": logmessage,
         "form": form,
         "events": events,
+        "filename": fn,
         #"dirparent": dirparent,
     }