`:e[dit]` with no parameters should reload current file, not open new file

The actual Vim behavior for the command :e (with no parameters) is to reload the current file in place. If the current buffer has been edited, this fails unless forced (as :e!).

2. Editing a file                                       edit-a-file

                                                        :e :edit reload
:e[dit] [++opt] [+cmd]  Edit the current file.  This is useful to re-edit the
                        current file, when it has been changed outside of Vim.
                        This fails when changes have been made to the current
                        buffer and 'autowriteall' isn't set or the file can't
                        be written.
                        Also see ++opt and +cmd.
                        {Vi: no ++opt}

This extension's current behavior appears to be to display a file dialog to open a file.

Start by locating the TypeScript command handling for :e and reproduce the no-parameter behavior described in the issue. Compare it with Vim's documented reload semantics; done means :e reloads the current file and does not open a file dialog.