Fixes #4739: Better display of exceptions when the response format is set as "raw" format
Fixes #4492: Support PostgreSQL-specific syntax for `QueryBuilder::alterColumn()`
Fixed test break.
Fixes #4643: Extra options specified in `yii\widgets\Breadcrumbs::links` will be treated as HTML attributes for the generated hyperlinks
Fixes #4450: Added `yii\bootstrap\Nav::renderDropdown()`
improve
Update tutorial-advanced-app.md
Added `yii\base\Controller::renderContent()`
Grammar fix

Minor words order fix.
Fixed typos [skip ci]
Merge pull request #6091 from nikbas/formatter-fix

Fixed typos in formatter guide
Merge pull request #6086 from artyhedgehog/patch-1

Grammar fix
Fixed `yii\mongodb\ActiveRecord` saves `null` as `_id`, if attributes are empty
some typos and grammar for Gii
Merge pull request #6078 from pabloassembler/patch-1

Update tutorial-advanced-app.md
Merge pull request #6076 from mirjalal/master

improve
ensure apidoc works with relative paths
add guidePrefix option for apidoc
Update README.md
Update structure-applications.md

little fix

close #6098