sql "is [not] distinct from" expressions are incorrectly split by "from"

[IgnorantWalking]

Describe the bug
When formatting a "is [not] distinct from" SQL expression (postgreSQL snowflake), the library seems to look for the "from" part and uses it to split the expression into multiple lines, even when exists enough horizontal spaces to keep the expression untouched.

To Reproduce
Example input expression:

select foo, bar, baz
from dual
where foo is not distinct from baz or bar is distinct from baz

Expected behavior
The "is [not] distinct from" expressions should be kept in a single line:

select foo, bar, baz
from dual
where foo is not distinct from baz 
or bar is distinct from baz

Actual behavior

select foo, bar, baz
from dual
where foo is not distinct
from baz or bar is distinct
from baz

Additional context
tested with sqlfmt v0.13.0

Many, many thanks for the library!! Even in the current early stage is a really useful tool for us!

[tconbeer]

Thanks for the report. Never heard of "is distinct from" before. Will be an easy add.

[kxzk]

@tconbeer If you're open to it, I'm happy to work on implementing this. Seems like a simple add to Rule(name="word_operator", ...) in sqlfmt/rules/__init__.py.

Let me know!

[tconbeer]

Yes, exactly! And add tests, please!

[kxzk]

@tconbeer lost on step 3 from here - don't see any unformatted tag, thus can't checkout branch. What am I missing?

[tconbeer]

Don't worry about updating the primer -- you probably don't need to for this change. Please just open a PR and it'll run in CI. I'll help you with primer changes if necessary

[tconbeer]

closed by #332