Rename goto_definition to goto_definitions.

jedi/api/__init__.py

@@ -374,7 +374,7 @@ class Script(object):
                         # Iterate tuples.
                         unpack_tuple_to_dict(self._evaluator, types, testlist)
                 else:
-                    try_iter_content(self._evaluator.goto_definition(node))
+                    try_iter_content(self._evaluator.goto_definitions(node))
                 self._evaluator.reset_recursion_limitations()
 
             ana = [a for a in self._evaluator.analysis if self.path == a.path]