Rename _versions attribute to satsfy template renderer

aleksis/core/mixins.py

@@ -53,7 +53,7 @@ class ExtensibleModel(models.Model, metaclass=_ExtensibleModelBase):
     This base model ensures all objects in AlekSIS apps fulfill the
     following properties:
 
-     * _versions property to retrieve all versions of the model from reversion
+     * `versions` property to retrieve all versions of the model from reversion
      * Allow injection of fields and code from AlekSIS apps to extend
        model functionality.
 
@@ -107,7 +107,7 @@ class ExtensibleModel(models.Model, metaclass=_ExtensibleModelBase):
         pass
 
     @property
-    def _versions(self) -> List[Tuple[str, Tuple[Any, Any]]]:
+    def versions(self) -> List[Tuple[str, Tuple[Any, Any]]]:
         """Get all versions of this object from django-reversion.
 
         Includes diffs to previous version.

aleksis/core/templates/core/partials/crud_events.html

 {% load i18n data_helpers %}
 
 <ul class="collection">
-  {% for version in obj._versions %}
+  {% for version in obj.versions %}
     <li class="collection-item">
       <strong>
         {{ version.0.revision.get_comment }}