Make internal links to errors in the Active Record Validations guide

[elebow]

Summary

In the Active Record Validations guide, make references to errors links to the API documentation, according to existing convention.

[p8]

Hey @elebow.
Just curious. What is the convention here? 🙂
Do we link the first time it's mentioned in a new section?

[elebow]

That is how it appears from the rest of the file, but not exactly strictly.

[jonathanhefner]

The convention that I've been using is to link the first occurrence of a term in the guide, similar to Wikipedia. Sometimes it makes sense to link additional occurrences though. Like when the first occurrence is just mentioning the term in passing, and there is a dedicated section for it later in the guide. Or when there is a summary that lists several terms outside of their dedicated sections. In general, I try to provide convenience while avoiding "link fatigue".

[elebow]

After a few days of thought, I removed the internal links and reduced the PR to just the typo fix that initially motivated it.