Fix issues around whitespace after dot completions, fixes #1954

jedi/api/completion.py

@@ -291,6 +291,8 @@ class Completion:
                 )
             elif nonterminals[-1] in ('trailer', 'dotted_name') and nodes[-1] == '.':
                 dot = self._module_node.get_leaf_for_position(self._position)
+                if dot.type == "newline":
+                    dot = dot.get_previous_leaf()
                 if dot.type == "endmarker":
                     # This is a bit of a weird edge case, maybe we can somehow
                     # generalize this.

test/test_api/test_interpreter.py

@@ -867,3 +867,9 @@ def test_star_import_completions():
 
     assert 'dump' in names
     assert 'dumps' in names
+
+
+def test_whitespace_after_dot_completion(Script):
+    # From #1954
+    completions = jedi.Interpreter("object. \n", []).complete(1, 8)
+    assert "mro" in [c.name for c in completions]