message: doc (book)[12/14]: "Cargo Guide"/"Continuous Integration": link terms to glossary
  The following term(s) are linked to their Glossary entries:
  - package
diff: ### Travis CI
  -To test your package on Travis CI, here is a sample `.travis.yml` file:
  +To test your [package][def-package] on Travis CI, here is a sample
  +`.travis.yml` file:
  ```yaml
  language: rust
  @@ -86,3 +87,5 @@ This will test and build documentation on the stable channel and nightly
  channel, but any breakage in nightly will not fail your overall build. Please
  see the [builds.sr.ht documentation](https://man.sr.ht/builds.sr.ht/) for more
  information.
  +
  +[def-package]: ../appendix/glossary.md#package '"package" (glossary entry)'
  