The `test_override_signatures` linter is about validating the parameters
of overriding functions. It verifies that when a method overrides another
from a parent model, the new method has a signature that is compatible
with the method it overrides: same arguments, same default values, same
annotations.
Because it also verified annotations, when a parent method was
annotated, all the child methods had to be annotated too. We actually
only care about the annotations when the two methods are annotated, we
don't want to enforce annotations on non-annotated methods.
Note 1: the shortcut to skip `(self, *args, **kwargs)` is broken, the
code has been removed.
Note 2: the code about `parent_class` is dead code that survived a
previous refactor.
Note 3: xdo likes it when I respect flake8-errmsg (EM101-103)
Part-of: odoo/odoo#133049
Julien Castiaux
2dff83386d