Improve getCharacterRemovalRange.js

[matedeilo]

Summary
PR for issue 1116
#1116

Test Plan
No tests added.

[flarnie]

Thanks for working on this!

It's close, but I have one concern.

Since there are two boolean params, we have 4 possible cases to cover, not just 2. Specifically; getEntityRemovalRangeAtStart passes 'true, undefined' and the two calls it is replacing pass 'false, true' and 'true, false' respectively, so this could change the logic of what happens.

This code isn't well tested so please do some manual testing - I think you could manually test by opening the entity example in your browser and make selections that overlap entities, then hit 'delete'.

https://github.com/facebook/draft-js/blob/master/examples/draft-0-10-0/entity/entity.html

[flarnie]

Or even better, add some tests? :)

[matedeilo]

I will add some test, thnks for the advice.

[flarnie]

Since this has been open for a while with no updates I'm closing - feel free to reopen when the change requests have been addressed. Thanks!