improved partners text and bugfix on cumstats page

rowers/views.py

@@ -3,6 +3,7 @@ import timestring
 import zipfile
 import operator
 import warnings
+from numbers import Number
 from django.views.generic.base import TemplateView
 from django.db.models import Q
 from django.db import IntegrityError, transaction
@@ -3377,7 +3378,7 @@ def cumstats(request,theuser=0,
     elif request.method == 'POST' and "datedelta" in request.POST:
 	deltaform = DeltaDaysForm(request.POST)
 	if deltaform.is_valid():
-	    deltadays = deltaform.cleaned_data['deltadays']
+	    deltadays = deltaform.cleaned_data['deltadays']
 	    if deltadays != 0 and isinstance(deltadays, Number):
 		enddate = timezone.now()
 		startdate = enddate-datetime.timedelta(days=deltadays)