Resolve merge path to absolute to avoid ValueError

https://git.afpy.org/AFPy/potodo/issues/35

Author: m-aciek

completion.py

@@ -43,9 +43,9 @@ def get_completion(
             break
     path_for_merge = Path(clones_dir, 'rebased_translations', repo)
     project = potodo.merge_and_scan_paths(
-        [clone_path.resolve()],
+        [clone_path],
         pot_path=Path(clones_dir, 'cpython/Doc/build/gettext'),
-        merge_path=path_for_merge,
+        merge_path=path_for_merge.resolve(),
         api_url='',
     )
     completion = project.completion