magento/magento2#5035 Cannot subscribe to events with a number in name

[Mobecls]

Allow to use digits at names of events

Description

Fixed inconsistence in names in events and sections in system.xml

Fixed Issues (if relevant)

1. I can not to subscribe on change of all sections in Stores ->Configuration using event admin_system_config_changed_section #5035 I can not to subscribe on change of all sections in Stores ->Configuration using event admin_system_config_changed_section

Manual testing scenarios

M 2.0.7

1. Create extension, create etc/adminhtml/system.xml there
2. add section tab with id, that contains number, in my case "b2b" https://drive.google.com/a/interiorwebdesign.com/file/d/0BzTvZltZJMLlemNCOGVwdUM5S00/view?usp=drivesdk
3. create etc/adminhtml/events.xml and add event listener to listen to changing of this section https://drive.google.com/a/interiorwebdesign.com/file/d/0BzTvZltZJMLlRFpqOEIyc2RKRW8/view?usp=drivesdk

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[miguelbalparda]

Am I missing something or this one is a duplicated of #12745?

[Mobecls]

Yes, this one is a duplicated of #12745. I created it because the changes were commited by user @aleksmitskevich. The user doesn't have an access to the project. So I couldn't sign the CLA.

[miguelbalparda]

Gotcha, will close the other one. Thanks!