Inspectdb command shows ugly classnames from django-based tables

[Francisco Javier Lendínez Tirado]

Today I used the inspectdb command to test it. When it recovered the models, I see that class names are "ugly" when these models are default-created Django models.

For example:
Original model

class User(AbstractUser):
    # ...
    token = models.CharField(default=get_random_string, unique=True, max_length=20)

Generated model

class UsersUser(models.Model):
    token = models.CharField(unique=True, max_length=20)
   # ...

    class Meta:
        managed = False
        db_table = 'users_user'

---

UsersUser (or AppnameModel) could be counterintuitive, a simple flag --remove-appnames is enough to indicate that the first word could be removed (understanding that most of the app names are only a word).

Here we can check that the flag is active and remove the first word:
​https://github.com/django/django/blob/master/django/core/management/commands/inspectdb.py#L43

This improvement seems trivial but is useful enough to take it into account because these table names need manual actions, avoiding sync models automatically between projects automatically (for example)

[Mariusz Felisiak]

Duplicate of #31847.