Update both `:tabedit` and `:tabnew` commands in order to support a
single argument, a filename, that, when provided, ensures that the new
tab either opens an existing file or associates the new tab with the
filename, so that when saving the buffer's content, the file is created.
Relates to #21112
Release Notes:
- vim: Added support for filenames in both `:tabnew` and `:tabedit` commands
Dino
978b75bba9