detect unevaluated inline-html code after an rearly return

[pilif]

this is a followup after #6876

this fixes #6877

[orklah]

It may have been done to avoid reporting spaces or line feed after closing PHP tag. I'm inclined to accept this, if someone complains, we'll at least have a use case we'll be able to add in test suite...

[pilif]

the check was added explicitly in 6550394, but the commit message doesn't give a reason, so we still don't know whether it was intentional

[weirdan]

Thanks!