Fix #7531 - "Unreachable statement" false positive for html whitespace

[murilohpucci]

Hey, first time here, I hope this can help you.

Fixing: #7531

[rvanvelzen]

You should add a test with non-whitespace html as well, to make sure that that is reported.

[murilohpucci]

You should add a test with non-whitespace html as well, to make sure that that is reported.

I hope I got it right, I've just added one more test scenario where there's non-whitespaces, and in this case it's expected to not be reported by phpstan

[rvanvelzen]

Sorry, I guess that was a bit ambiguous. I avtually meant non-whitespace and non-empty, because that should be reported :)

[ondrejmirtes]

@murilohpucci Would be nice if you were able to finish this PR :)