Allow projects to disable auto-linking on certain words

[st0012]

ruby/ruby#12451 introduced the top-level Ruby constant, which means that every Ruby in https://docs.ruby-lang.org/en/master/index.html are now linked to it:

Instead of escaping them one by one (there are more than a thousand occurrences in ruby/ruby), RDoc should allow projects to list a set of words that should not be auto-linked.

[ParadoxV5]

Set is another common word.

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I wonder, what was the decision to autolink constants in the first place?

[st0012]

Set is another common word.

Good call.

I wonder, what was the decision to autolink constants in the first place?

I don't know as I wasn't the maintainer back then. But IMO for ruby/ruby, the biggest project using RDoc, this decision makes sense as it saves a lot of linking syntax when writing core component docs.

[skipkayhil]

Rails would definitely find this useful as well, we currently do the escaping manually 🙈

https://github.com/rails/rails/blob/c31cc0b2e451b9271bdfedc68884e8ae38a7c0fb/actionview/lib/action_view/base.rb#L102-L103

[st0012]

PR: #1259