Put browser-compat in front-runner for xpath & xslt

[teoli2003]

What was wrong/why is this fix needed? (quick summary only)

We want to have browser-compat in front-runner: this allows us to write {{Compat}} without parameter, and in the future, {{Spec}} (and likely more).

This PR covers xpath & xslt for the case without problem: 1 macro Compat in the page and its parameter matching the slug. Other cases (no Compat macros on a page, multiple Compat macros, macro not matching the slug, will be done at a later stage).

MDN URL of the main page changed

3 files in api/*

Issue number (if there is an associated issue)

openwebdocs/project#36

Anything else that could help us review it

[github-actions]

Preview URLs

• https://pr5500.content.dev.mdn.mozit.cloud/en-US/docs/Web/XSLT/Element/stylesheet
• https://pr5500.content.dev.mdn.mozit.cloud/en-US/docs/Web/XPath/Axes/child
• https://pr5500.content.dev.mdn.mozit.cloud/en-US/docs/Web/XPath/Axes/self

Flaws

Note! 1 document with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/XSLT/Element/stylesheet
Title: <xsl:stylesheet>
on GitHub
Flaw count: 1

• broken_links:
  • Can't resolve /en-US/docs/Web/XSLT/Element/for-each-group

---

URL: /en-US/docs/Web/XPath/Axes/child
Title: child
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: xpath.axes.child

External URLs

URL: /en-US/docs/Web/XSLT/Element/stylesheet
Title: <xsl:stylesheet>
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/XPath/Axes/child
Title: child
on GitHub

No new external URLs

---

URL: /en-US/docs/Web/XPath/Axes/self
Title: self
on GitHub

No new external URLs

(this comment was updated 2021-05-31 08:32:56.904125)

[Elchi3]

I'm merging this for the moment but please note that BCD plans to remove XSLT and XPath data. (we don't have any real data, just stubs, and we don't want to maintain them anymore)

mdn/browser-compat-data#9830