Incorrectly flagging "de facto"

**What got flagged?**
Any sentence containing "de facto" or "de-facto".
See the examples for concrete sentences.

**Why is this incorrect?**
It's a common phrase used instead of "in practice".
See the [wiki article](https://en.wikipedia.org/wiki/De_facto) for reference.

**Example of correct usage:**
You can find a lot of example usage in practice.
See [github search "de facto"](https://github.com/search?q=%22de+facto%22&type=code)
or [github search "de-facto"](https://github.com/search?q=%22de-facto%22&type=code)

- [Or is it a de facto part of the Steinmetz diamond empire?](https://github.com/ANCIR/PanamaPapers/blob/8f1117fdf5baeb8522e6172574219720d17086c5/guinea.md?plain=1#L43)
- [The de-facto solution to flexible routing with nested views in AngularJS](https://github.com/angular-ui/ui-router)

Search the grammar-checking rules for the patterns "de facto" and "de-facto", then reproduce the report using the sentences linked in the issue. Update the relevant rule so these common phrases are not flagged, and run the existing rule tests or checker test suite to confirm both spellings remain accepted.

Written by the indexing model from the issue text.