The + for configs ONLY applies to dbt_project.yml and not elsewhere

[dbeatty10]

Contributions

• I have read the contribution docs, and understand what's expected of me.

Link to the page on docs.getdbt.com requiring updates

At least these two pages:

• https://docs.getdbt.com/reference/dbt_project.yml
• https://docs.getdbt.com/reference/configs-and-properties

What part(s) of the page would you like to see updated?

Note that we demarcate between a folder name and a configuration within dbt_project.yml by using a +.

The + for configs ONLY applies to dbt_project.yml under the corresponding resource key and does not apply to:

1. config() Jinja macro within a resource file
2. config property in a .yml file.

So we should include a short note similar to the one found here:

We demarcate between a folder name and a configuration by using a +, so marketing, paid_ads, and google below are folder names, whereas +materialized is a configuration being applied to those folder and all folders nested below them.
...

models:
  jaffle_shop:
    marketing:
      +materialized: view
      paid_ads:
        google:
          +materialized: table

Additional information

Context: dbt-labs/dbt-core#9314