Lines with NBSPs:
this is a testthis is a testthis is a testthis is a testthaaaaaaaaaaaaaaaaaaaaais is a testthis is
this is a testthis is a testthis is a testthis is a testthaaaaaaaaaaaaaaaaaaaaais is a testthis is testthis is a testthis is a testthis is a testthis is a testthis is a testthis is a testthis is a testthis is a testthis is a test.
A regular line:
This is a test. Tesssssssssssssssssssst. A test test test testy test. (Huh huh. Testes).
