Change FROM clause formatting (make it more human friendly)

[azat]

Changelog category (leave one):

• Improvement

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
Fix trailing whitespaces in FROM clause with subqueries in multiline mode, and also changes the output of the queries slightly in a more human friendly way.

Detailed description / Documentation draft:
Before:

$ clickhouse-format <<<'select * from system.one, (select * from system.one)'
SELECT *
FROM system.one
,
(
    SELECT *
    FROM system.one
)

After:

$ clickhouse-format <<<'select * from system.one, (select * from system.one)'
SELECT *
FROM system.one,
(
    SELECT *
    FROM system.one
)

NOTE: should it be marked with Backward Incompatible Change? (since it changes the output that someone may relay on)

[alexey-milovidov]

should it be marked with Backward Incompatible Change?

It's alright, we shouldn't guarantee how queries will be formatted.

[kitaisreal]

@azat there are some issues with functional statelss tests. Are they related to changes ?

[azat]

there are some issues with functional statelss tests. Are they related to changes ?

AFAICS - no

• there are few failures due to the test takes too long (marked them as long)
• there is one strange failure - 01414_push_predicate_when_contains_with_clause (will take a look)
• and unrelated 00953_zookeeper_suetin_deduplication_bug

[azat]

Functional stateless tests flaky check (address) — Timeout, fail: 67, passed: 2682

01414_push_predicate_when_contains_with_clause - #24259