v1.25.5

Minor regression fix: Format `--config-default` output correctly.

In v1.25.4 the top level configuration file variable `base_scheme` was added.
From now on, all other schemes inherit from this structure.
This release v1.25.5 updates the formatting of the configuration file generated
by the command line option `--config-default`. In the generated configuration
file all variables are commented out with `#` and shown with their default
values. To change a default value, uncomment the corresponding line(s) and
update the value. Rename the file `tpnote.toml` and place it in one of the
searched locations. To get a list of those locations type `tpnote -V`.