Docs Post-Merge review "Add class doc for bulk import models"

app/models/bulk_import.rb

 # frozen_string_literal: true
 
-# The BulkImport import model links together all the models required to for a
-# bulk import of groups and projects to a GitLab instance, and associates these
-# with the user that initiated the import.
+# The BulkImport model links all models required for a bulk import of groups and
+# projects to a GitLab instance. It associates the import with the responsible
+# user.
 class BulkImport < ApplicationRecord
   belongs_to :user, optional: false
 

app/models/bulk_imports/entity.rb

 # frozen_string_literal: true
 
-# The BulkImport::Entity represents a Group or Project that is going to be
-# imported during the bulk import process. An entity is nested under the a
-# parent group when it is not a top level group.
+# The BulkImport::Entity represents a Group or Project to be imported during the
+# bulk import process. An entity is nested under the parent group when it is not
+# a top level group.
 #
 # A full bulk import entity structure might look like this, where the links are
 # parents:
@@ -15,8 +15,8 @@
 #          |                                 |
 #    ProjectEntity                        Project
 #
-# The tree structure of the entities will result in the same structure for the
-# imported Groups and Projects.
+# The tree structure of the entities results in the same structure for imported
+# Groups and Projects.
 class BulkImports::Entity < ApplicationRecord
   self.table_name = 'bulk_import_entities'