- Most usages of this were in the `pretty_duration` method, where "s"
is better described as "seconds" since we're calculating a duration.
- I also took the executive decision to do the same to "m" which refers
to "minutes".
I know that we're outside our normal deprecation cycle but: these are
totally broken with the API and it doesn't make sense to support them
only for non-core formulae.
- This `Homebrew/utils.rb` file contains one `@api public` method so it's now
included in `Style/Documentation`.
- This method not having a comment was causing the style specs to fail because
this file isn't usually failing RuboCop.
- And the test description was confusing so I improved it.
