(sqlfmt is amazing, exactly what I was after.)

Describe the bug
It seems that currently using isn't recognised as a keyword, resulting in slightly odd formatting when used in a join clause see below. No space between using and the list of columns makes it look like a function call, which is confusing

To Reproduce

select a_column, b_column, c_column, d_column
from table_a
left outer join table_b using (id, something_else)

Expected behavior

select a_column, b_column, c_column, d_column
from table_a
left outer join table_b using (id, something_else)

Actual behavior

select a_column, b_column, c_column, d_column
from table_a
left outer join table_b using(id, something_else)

Additional context
What is the output of sqlfmt --version?
sqlfmt, version 0.9.0