Introduce get_qualified_names for names, it's easier to implement goto like this

jedi/api/__init__.py

@@ -38,7 +38,6 @@ from jedi.evaluate.syntax_tree import tree_name_to_contexts
 from jedi.evaluate.context import ModuleContext
 from jedi.evaluate.base_context import ContextSet
 from jedi.evaluate.context.iterable import unpack_tuple_to_dict
-#from jedi.evaluate.gradual.typeshed import try_to_merge_with_stub
 from jedi.evaluate.gradual.stub_context import try_stubs_to_actual_context_set, \
     try_stub_to_actual_names
 from jedi.evaluate.gradual.utils import load_proper_stub_module

jedi/api/classes.py

@@ -324,12 +324,8 @@ class BaseDefinition(object):
         ]
 
     def goto_assignments(self):
-        if self._name.tree_name is None:
-            return self
-
-        names = self._name.goto()
-        names = try_stub_to_actual_names(names, prefer_stub_to_compiled=True)
-        return [Definition(self._evaluator, n) for n in names]
+        return [self if n == self._name else Definition(self._evaluator, n)
+                for n in self._name.goto()]
 
     def infer(self):
         tree_name = self._name.tree_name