So the xml module has a lot of parameters that combined together do
specific things. however it does not really describe which parameters
are required together, or which ones are required.
This PR fixes that situation and makes it impossible to provide
confussing parameters combinations.
Also, `pretty_print` was used as a flag to modify the output, but also
as an action to reformat the file (without other change). This is
problematic the way it was designed. This fixes that too.
This fixes#28194
11c9756d9c