* #uniq is an alias of #distinct
* #uniq will be deprecated, see: rails/rails@adfab2dcf4003ca564d78d4425566dd2d9cd8b4f

Bumps to 5.7

* rewords a few awkwardly worded sentences
* adds some punctuation
* adds a few missing words

[ci skip]

This example is dependent on the `:end_at` option and has been removed
from `4-2-stable` (d167b811)

[ci skip]

Example:
  User.left_outer_joins(:posts)
  => SELECT "users".* FROM "users" LEFT OUTER JOIN "posts" ON "posts"."user_id" = "users"."id"

Deprecated passing of `start` value to `find_in_batches` and `find_each` in favour of `begin_at` value.

that complements the `start`parameter to specify where to stop batch processing

- Changed `IN` to `ON` in all note sentences in guides.

Added the SQL equivalent of the find_by method

Update active_record_querying.md

Update active_record_querying.md

Commit 65a2977c added a `pre-wrap` style for white spaces on `.note`
paragraphs. However, this is first inconsistent as other notes like
warnings don't have this style applied. Furthermore, it seems to be
unneeded for mobile devices.

Also revert changes made in #18147 since they aren't needed anymore.

Cross-refs #18138.

[ci skip]

References #18148.

References #18138

Reference: https://github.com/rails/rails/commit/d4fd0bd17709735ac91e434c94fe99429f078c6e

cc @schneems

Reference: https://github.com/rails/rails/commit/f7e4362011ceb1317fd401125d48d7ccb9a1079c

This reverts commit 0f6b101e.

Reason: It's better to let `unscope` be documented. We can add a
separate section for `except`.