The export by tangle from the org file is constrained to the first
set of tests by pytest. This section is rewritten to yield a more
portable format to work either for Linux Debian, or Windows 10.
Running
```shell
python -m pytest
```
in their respective virtual environments, the set of 60 items to
test all pass (Debian: Python 3.12.6, pytest 8.3.3; Windows 10:
Python 3.12.4, pytest 8.3.3).
Signed-off-by: Norwid Behrnd <nbehrnd@yahoo.com>
Checks of appendfilename --smart-prepend now consider date2name'
default time stamp (YYYY-MM-DD), the by date2name --withtime
(YYYY-MM-DDTHH.MM.SS), or absence of such by pattern recognition
with regular expressions.
For programmatic testing of appendfilename, a test generator
is written. This tangles a Makefile, a pytest.ini and the
test script. Despite the incomplete coverage of this approach,
an inconsistency in appendfilename's interaction on files with
the simple YYYY-MM-DD timestamp (date2name) is spot.
