Resolve "add .yml extension as valid for config files"
Description
The MR adds .yml as a valid file extension for config files, using pathlib
to
find the file suffix.
A test has been added, in fact with a parameter to an existing test ; the
test yaml file is copied in a temporary file either with extension .yaml
or
with extension .yml
in order to check if it works with both files.
Related Issues
Closes #160 (closed)