When contributing to Yii you have to follow some conventions and a simple workflow. It allows us to handle the requests quickly and ensure best quality for the Yii core code.
Following guidelines will result in less work for both you and the core team.
Please take the time and read the following guide from beginning to the end: https://github.com/yiisoft/yii/wiki/Git-workflow-for-Yii-contributors
For code style see: https://github.com/yiisoft/yii/wiki/Core-framework-code-style
A common issue for many pull requests is inconsistent line endings. You can learn about dealing with it at: https://help.github.com/articles/dealing-with-line-endings
Thanks for your contribution!
Contributing translations does not have a workflow like with code. You don't need to create an issue, pull request will be enough.
See the following guide on how to contribute to Yii documentation: https://github.com/yiisoft/yii/wiki/Documentation-translation-guidelines
This one is also available in Russian language: https://github.com/yiisoft/yii/wiki/Russian-Translation-Guidelines
Thanks for your contribution!