Change tabs in dbt_project.yml to 2 spaces instead of 4

[alexiswo]

Details

Changes the dbt_project.yml file tab length to align with the tab length of 2 spaces specified in the YAML style guide section of the internal dbt coding convention docs AND the dbt_project.yml page on docs. Unifying the tab length will make it easier for users to copy and paste from the docs into their first projects, an issue that we see a lot of users run into during dbt Learn sessions.

Testing

Copy and pasted this into the dbt_project.yml in a new project in dbt Cloud. Ran dbt run without any issues. See screenshots below.

[alexiswo]

@drewbanin - would love if you could test this before merging as I'm worried about breaking everyone's dbt_project.yml files!

[drewbanin]

thanks @alexiswo ! I didn't think of this at first, but there's one thing to note here: The dbt init command created a project by cloning this tag. So, just merging this PR isn't actually going to update dbt's behavior. We're either going to need to update the tag (need to think on that one) or change how dbt works to not point to this one specific tag (maybe a branch instead?).

@jtcohen6 i feel like we discussed this recently - do you recall where we ended up on this question?

[jtcohen6]

Where we ended up: We should start vendoring the starter project through dbt directly, rather than having it live in this repo separately (dbt-labs/dbt-core#3005)

[alexiswo]

Got it. So, should I leave this PR here? Or put a ticket somewhere for the future when dbt-labs/dbt-core#3005 is done?

[jtcohen6]

I think we can move ahead with this PR as is. That way, when we get around to dbt-labs/dbt-core#3005, we'll be moving the right (updated) code into the dbt repo :)

[jtcohen6]

Good by me!

Note that, because dbt init on versions >0.17.0 clones from the dbt-yml-config-version-2 tag, we'd need to recreate the dbt-yml-config-version-2 tag for this to take effect in newer vresions, which is a bit tricky. The whole thing is trickier than it needs to be IMO; I'd much rather just move this code into the dbt repo and have starter projects tied to particular versions (dbt-labs/dbt-core#3005).

Also, this is (effectively) the same as #8, so I think we can close that after merging this. (There's a question there about whether to include the + in front of the materialized config, but let's save that for another day.)

[alexiswo]

Whoops! Didn't realize @jtcohen6 approved this. Merging now