Don't hard-code class names in TraitListEvent.__repr__ and similar __repr__ implementations

[mdickinson]

We currently hardcode the TraitListEvent class name in TraitListEvent.__repr__; instead, we should use self.__class__.__name__, so that subclasses don't have a misleading __repr__. See

traits/traits/trait_list_object.py

Line 57 in 786a39e

return "TraitListEvent(index={!r}, removed={!r}, added={!r})".format(

I haven't checked other __repr__s, but we will almost certainly need to update TraitDictEvent and TraitSetEvent similarly, and possibly others, too.

Ref: enthought/envisage#352