[Pages] Document wildcards before a file extension in _routes.json

[zkousama]

Summary

The _routes.json section says wildcards match any number of path segments, and every example puts the wildcard at the end of a rule (/users/*, /build/*). A wildcard also works before a file extension, which the page doesn't say: /api/*.json excludes every .json file under /api/, at any depth.

It's the rule a project needs when static files and Function routes share a path, like an API that serves pre-rendered .json files beside routes a Function answers. With only trailing wildcards to go on, the rule that looks available is /api/*, and that sends every static file under /api/ through the Function.

This adds that case as a third example, and fixes a missing space in the wildcard note.

I checked the behaviour on a Pages project before documenting it, with "include": ["/api/*"], "exclude": ["/api/*.json"] and a catch-all Function in functions/api/[[path]].js:

/api/communes/01.511.01.0.json              static file
/api/communes/01.511.01.0/indicators.json   static file
/api/communes/tanger                        Function
/api/communes/tanger/indicators             Function
/api/search                                 Function

Documentation checklist

• The change adheres to the documentation style guide.

[cloudflare-docs-bot]

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Review coverage

🟡 1 ownership area needs approval.

Suggested reviewers: @GregBrimble @irvinebroque

Needs approval	Eligible approvers	Suggested
pages	@aninibread, @GregBrimble, @irvinebroque, @MattieTK, @scottbuscemi, @WalshyDev, @cloudflare/product-owners	GregBrimble, irvinebroque

CODEOWNERS mappings for displayed areas (1)

Pattern	Owners
/src/content/docs/pages/	@aninibread, @GregBrimble, @irvinebroque, @MattieTK, @scottbuscemi, @WalshyDev, @cloudflare/product-owners