admin: show object's docstring on inheritance based lists

passbook/sources/oauth/migrations/0002_auto_20200520_1108.py

@@ -0,0 +1,33 @@
+# Generated by Django 3.0.6 on 2020-05-20 11:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_sources_oauth', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='oauthsource',
+            name='access_token_url',
+            field=models.CharField(help_text='URL used by passbook to retrive tokens.', max_length=255, verbose_name='Access Token URL'),
+        ),
+        migrations.AlterField(
+            model_name='oauthsource',
+            name='request_token_url',
+            field=models.CharField(blank=True, help_text='URL used to request the initial token. This URL is only required for OAuth 1.', max_length=255, verbose_name='Request Token URL'),
+        ),
+        migrations.AlterField(
+            model_name='oauthsource',
+            name='authorization_url',
+            field=models.CharField(help_text='URL the user is redirect to to conest the flow.', max_length=255, verbose_name='Authorization URL'),
+        ),
+        migrations.AlterField(
+            model_name='oauthsource',
+            name='profile_url',
+            field=models.CharField(help_text='URL used by passbook to get user information.', max_length=255, verbose_name='Profile URL'),
+        ),
+    ]