Convert to absolute paths in normalize_path

This round adds tests that provide a mixture of absolute and relative
paths, forcing it to standardize by making them all absolute upfront.

To decouple tests from `env::current_dir()`, a specialized internal
function was created for tests. The original function simply calls
`env::current_dir()` and passes its return value to the hidden function,
on which tests are run.

0 files changed, 0 insertions, 0 deletions