Fixes #6589: updated code style guide to mention else after return, adjusted code involved in the issue

[skip ci] fix left over closing backticks

Docs guide ja rest quick start [ci skip]

Update guides pt-BR [skip ci]

Fixes #6648: Added explicit type casting to avoid dblib issues on SQL Server 2014

Update structure-assets.md in guide-es [skip ci]

Fixes #6632: `yii\di\Container::get()` did not handle config parameter correctly when it is passed as a constructor parameter

Strip zero padding from ETag strings

[ci skip] Fixed typo

[skip ci] Guide es

Update guides pt-BR [skip ci]