The following sentence doesn't make sense:
But using `autoload_paths` on its own in the past (before Rails 5)
developers might configure `autoload_paths` to add in extra locations...
This changes it to the following:
Before Rails 5 developers might configure `autoload_paths` to add in
extra locations...
It also formats the text to use shorter line lengths.
The majority of items in this list are clauses that complete the sentence "...you will know...". But the 2nd item was an independent question with its own question mark, and the other changed one had the syntax of a question despite lacking a question mark.
* require, require_relative, load by double quotes
We're getting rid of all single quote usage, unless it serves a specific purpose, as per the general style guide.