Make it possible to complete in non-Python files

jedi/evaluate/sys_path.py

@@ -210,9 +210,9 @@ def transform_path_to_dotted(sys_path, module_path):
         if module_path.endswith(suffix):
             module_path = module_path[:-len(suffix)]
             break
-    else:
-        # There should always be a suffix in a valid Python file on the path.
-        return None
+    # Once the suffix was removed we are using the files as we know them. This
+    # means that if someone uses an ending like .vim for a Python file, .vim
+    # will be part of the returned dotted part.
 
     for p in sys_path:
         if module_path.startswith(p):

test/test_evaluate/test_imports.py

@@ -254,11 +254,13 @@ def test_compiled_import_none(monkeypatch, Script):
     assert not Script('import sys').goto_definitions()
 
 
-def test_relative_imports_with_multiple_similar_directories(Script):
+@pytest.mark.parametrize(
+    'path', ('api/whatever/test_this.py', 'api/whatever/file'))
+def test_relative_imports_with_multiple_similar_directories(Script, path):
     dir = get_example_dir('issue1209')
     script = Script(
         "from .",
-        path=os.path.join(dir, 'api/whatever/test_this.py')
+        path=os.path.join(dir, path)
     )
     # TODO pass this project to the script as a param once that's possible.
     script._evaluator.project = Project(dir)