The text "foo a b c bar" should have an underline that is offset 2ch forward in each case, applied separately to each line:
foo a b c bar
foo a
b c
bar
foo a b c bar
foo a
b c
bar
foo a b c bar
foo a
b c
bar
foo a b c bar
foo a
b c
bar
foo a b c bar
foo a
b c
bar
foo a b c bar
foo a
b c
bar