private method doesn't work for singleton methods defined this way
Add tests to ActiveSupport:XmlMini to_tag method
additional note about routes in functional tests for engines [ci skip]
add include_hidden option to collection_check_boxes helper
Save has_one associations only if record has changes

Prevents save related callbacks such as `after_commit` being
triggered when `has_one` objects are already persisted and have no
changes.
Don't load test env by default
Fix insertion of records for hmt association with scope, fix #3548
Only use BINARY for mysql case sensitive uniqueness check when column has a case insensitive collation.
Auto-generate stable fixture UUIDs on PostgreSQL.
Fixes: #11524
Add tip about using RDoc's --pipe command to quickly test the output of
a piece of documentation.

This can be useful for trying out combinations of markup and code, as
discussed in rails/rails@225bcad
[Active Record] Renamed private methods create_record and update_record

 This is to ensure that they are not accidentally called by the app code.
 They are renamed to _create_record and _update_record respectively.
 Closes #11645
change 'assert !' to 'assert_not' in guides [ci skip]
Merge pull request #14120 from gregmolnar/guides

change 'assert !' to 'assert_not' in guides [ci skip]
Revert "speed up the collection proxy reader method, but slow down the constructor"

This reverts commit f9e4c3c7c0c4152b62fe9202a9d12262884bb118.

[fixes #14116]
Add regression test for collection proxy reader

[related #14116]
[skip ci] Fix the javascript path in guide for asset modules
Merge branch 'master' of github.com:rails/docrails
Merge pull request #14124 from arthurnn/fix_14116

Fix collection proxy exists? regression
Merge pull request #14086 from jingweno/master

Fix the javascript path in guide for asset modules [skip ci]
Check if the `request` variable isn't nil when calling render_to_string

closes #14125