Spelling aid idea: automatically expand "it's" to "it is" so that you can immediately see where you should have written "its" instead.
@deshipu Except when it should be expanded to “it has” of course.
@edavies That gets tricky. Maybe you could just fix that manually then.
@edavies Yeah, you would need to find the verb and then guess the tense. Gets even more fun when you consider irregular verbs...