This is a follow-up to #15154. In addition to `bin`, the `service` block can also reference other cellar paths like `libexec`. They don't work with the API either, as reported in https://github.com/orgs/Homebrew/discussions/4459. Violations are already corrected in Homebrew/homebrew-core#129736 and Homebrew/homebrew-core#129737. Signed-off-by: Ruoyu Zhong <zhongruoyu@outlook.com>
The preferred method is opt_bin because that works with the API and is more portable (works between versions). Also removed the last example from the docs of `bin/"name"` from the service block section