If you run `:PydocstringFormat` on a file that already has docstrings, it simply deletes the contents of the file. ``` py #!/usr/bin/env python def formGrid(x, y=None): z = x + y return z ``` Run `:PydocstringFormat`: ``` py #!/usr/bin/env python def formGrid(x, y=None): """formGrid. Parameters ---------- x : x y : y """ z = x + y return z ``` Then running it again deletes the contents of the file.