sort imports using isort. tested.

core/forms.py

@@ -2,16 +2,18 @@ import string
 from datetime import date
 
 import django.forms as forms
+from django.contrib.admin.widgets import AdminDateWidget
 from django.forms import ModelForm
 from django.forms.models import modelformset_factory
-from django.contrib.admin.widgets import AdminDateWidget
+
+from troggle.core.models.caves import (QM, Cave, CaveAndEntrance, Entrance,
+                                       LogbookEntry)
+from troggle.core.models.troggle import Expedition, Person, PersonExpedition
+from troggle.core.views.editor_helpers import HTMLarea
 
 #from tinymce.widgets import TinyMCE
 
-from troggle.core.models.troggle import Person, PersonExpedition, Expedition
-from troggle.core.models.caves import Cave, LogbookEntry, QM, Entrance, CaveAndEntrance
 
-from troggle.core.views.editor_helpers import HTMLarea
 
 '''These are all the class-based Forms used by troggle.
 There are other, simpler, upload forms in view/uploads.py