IDEA-101635 ManageProjectTemplates: multiple templates deleting works incorrectly
be prepared that file's language may be plain text whilst view provider has some other language (IDEA-101709, IDEA-101980)

this can happen if the base language has no parser definition (e.g. batch plugin)
IDEA-101944 ("Pointless boolean expression" inspection with multiple '&&' fails)
nicer API for plugins to modify inspection tool settings