x/website: Language Specification: Visible anchors for linkable sections

[Deleplace]

What is the URL of the page with the issue?

https://go.dev/ref/spec

Screenshot

What did you do?

I wanted to create a direct hyperlink to the section String concatenation and add it to a webpage in another Go-related website.

What did you expect to see?

Feature request: all the section headings (h2, h3, h4) would come with a trailing ¶ as a visual indicator for "Click here to get the direct URL to this section". Optionally, the ¶ char only shows up when the mouse approaches the heading. (All of this is the existing behaviour in all package pages at pkg.go.dev)

What did you see instead?

• Section headings are not hyperlinks
• The h2 and h3 have links in the Table of Contents, which makes link creation easier. But not the h4.
• Almost all of the h2, h3, h4 already have an id attribute. This is great, let's make good use of it! I could create my link to the section "String concatenation", but I had to inspect the page HTML for this.
• A few id attributes are missing: Simple slice expressions, Full slice expressions, etc.

[ALTree]

I had the same issue the other day. I think the old specification page on golang.org had visible anchors, because I remember using them in the past; so this is a recent regression due to the website migration.

[mvdan]

Coming from #56009 (a duplicate now closed), I'd like to see the same improvement to all structured documentation pages with headings under go.dev as well. For example, https://go.dev/ref/mod is a regular pain point for me, as I want to point other Go users to specific parts of the large page. cc @bcmills