Fixes #4277: `yii\grid\GridView` is no longer throwing an exception in non-debug mode when results are empty and `columns` aren't defined
Fixes #6103: Improved codeception config in app templates to ease testing of advanced app on multiple hosts
apidoc minor fixes: phpdoc, use statements, comments
Fixed phpdoc
Fixes #6279: `yii\db\Schema::getLastInsertID()` was passing wrong default schema name to PDO
added missing `@since` annotations
split formatter test
Changed #4277 behavior
Update runtime-routing.md

Shouldn't showScriptName be false to hide entry script name?
Merge pull request #6282 from larnu/patch-1

Update runtime-routing.md [skip ci]
better fix for #5448 not using customized DateTime class

fixes #6263 and has no problem with PHP Bug:

> it is a PHP bug: https://bugs.php.net/bug.php?id=45543
> Fixed in this commit: php/php-src@22dba2f#diff-7b738accc3d60f74c259da18588ddc5dL2996
>
> Fixed in PHP >5.4.26 and >5.5.10. http://3v4l.org/mlZX7
Enh: `yii fixture` command now offers help if no arguments are provided instead of crashing
Update input-forms.md

Minor syntax changes.
Merge pull request #6284 from cdvrooman/patch-27

[skip ci] Update input-forms.md
Update input-validation.md

Minor syntax changes.
Merge pull request #6286 from cdvrooman/patch-28

[skip ci] Update input-validation.md
Update input-file-upload.md

Minor syntax changes.
Merge pull request #6287 from cdvrooman/patch-29

[skip ci] Update input-file-upload.md