Rename CSS sign() function page

[wbamberg]

This page moves the page for the CSS sign() function from https://developer.mozilla.org/en-US/docs/Web/CSS/sign_function to https://developer.mozilla.org/en-US/docs/Web/CSS/sign .

The _function suffix breaks the bit of csssyntax that does some desperate munging of slugs to try to find a valid webref identifier, which doesn't expect this kind of form for page slugs.

Instead of moving the page we might choose to adapt csssyntax instead, or change the macro call to take an explicit argument (and as discussed in https://github.com/orgs/mdn/discussions/179 this would probably be better anyway in the long run) except that:

• we don't use suffixes for slugs unless there is an actual name clash (for example, we don't have var_function or linear-gradient_function)
• we don't use a _function suffix anywhere AFAIK, we only use _value

So this slug seems to be inconsistent with our practice everywhere else.

[github-actions]

Preview URLs

• https://pr19471.content.dev.mdn.mozit.cloud/en-US/docs/Web/CSS/sign

Flaws

URL: /en-US/docs/Web/CSS/sign
Title: sign()
on GitHub
Flaw count: 1

• bad_bcd_queries:
  • No BCD data for query: css.types.sign

External URLs

URL: /en-US/docs/Web/CSS/sign
Title: sign()
on GitHub

No new external URLs

[teoli2003]

👍