Resolve #3496182 "Markdown easy wont"
This change moves the filter.format.markdown.yml
file from config/install
to config/optional
, so installation will not fail if the Markdown input format already exists.
Also adds a new InstallTest
test class to simulate installing the module when the Markdown input format already exists, verifying it will install correctly.
Note that the onus will be on the site builder to add the filter to the Markdown input format, assuming that's their intention.
Closes #3496182