These tests deliberately use non-standard formatting, so that the line
execution counts reported by `llvm-cov` reveal additional information about
where code regions begin and end.

Some of these tests use non-standard formatting that we can simulate by
strategically adding `//` line comments.

One contains `where` clauses that would be split across multiple lines, which
we can keep on one line by moving the bounds to the generic type instead.

These tests can simply be reformatted as normal, because the resulting changes
are unimportant.