Add HTML fragment references for constants

[p8]

In large libraries with a lot of constants (Rails for example), it would be nice to deep link to these constants.

[nobu]

Where and for what do you expect these are used?
RDoc adds constant's names as ids now, e.g., https://docs.ruby-lang.org/en/master/RDoc.html#ATTR_MODIFIERS

[p8]

It would be nice if we could deeplink to the following constants in the Rails API docs:

https://api.rubyonrails.org/classes/ActionDispatch/Http/Cache/Response.html

It helps when trying to communicate the values of these constants with others.
For example I could share the DATE constant here:
https://api.rubyonrails.org/classes/ActionDispatch/Http/Cache/Response.html#constant-ActionDispatch::Http::Cache::Response::DATE

[nobu]

https://api.rubyonrails.org/classes/ActionDispatch/Http/Cache/Response.html

Is that page generated with RDoc?

[p8]

Yes. It uses https://github.com/rails/sdoc which is built on top of RDoc.

[nobu]

It seems a role of views.
Shouldn't it be done in template files?

[nobu]

SDoc doesn't seem adding id to constants. https://github.com/rails/sdoc/blob/4d1c71adff9c5f0d4fcf8c50eab29f4bcf301abf/lib/rdoc/generator/template/rails/_context.rhtml#L93C1
Shouldn't it be fixed first?