- site.yaml keys site_url and site_label, validated: http(s) URL with a host
or a path starting with a single /; a label needs a URL
- docs:build and docs:serve flags --site-url and --site-label override them
the way --base-url overrides base_url
- every page header, the 404 page included, links back with the explicit
label, else the URL host, else Home; unset output is unchanged
- docs/console/utilities.md documents the keys and flags
- load, render, emit, snippet, highlight, serve and checker branch tests;
docs:build --check, docs:sync and docs:serve output tests in cmd/summer
- fix: a CRLF or BOM page is reported as such, not as a page without a
frontmatter block (TestFrontmatterEncodingProblems)
- fix: src=#Type.Method finds a method with a parenthesised receiver
(TestSnippetGenericsAndGroups, Box.Paren)
- fix: docs:serve adds its watches before announcing the server, so an
edit made right after the serving line rebuilds (TestServeWatchRebuilds)
