An accessibility issue fixed in MDL-74800 change the core_courseformat\output\local\content\cm\cmname class. Previously to that change the cmname was extending inplace_editable but this was not possible due to the fact that the content is displayed as a block, not as an inline element. In the new code, the inplace_editable element is the cm\title output, not the cm\cmname one.

This makes the $editable constructor param useless and should be deprecated in Moodle 4.1 following the official param deprecation process.