Version 5.23.0 ### Bug fixes Presentation-related elements DOM elements are now marked as such to help screen readers. [markdown mode](http://codemirror.net/mode/markdown/): Be more picky about what HTML tags look like to avoid false positives. ### New features `findModeByMIME` now understands `+json` and `+xml` MIME suffixes. [closebrackets addon](http://codemirror.net/doc/manual.html#addon_closebrackets): Add support for an `override` option to ignore language-specific defaults. [panel addon](http://codemirror.net/doc/manual.html#addon_panel): Add a `stable` option that auto-scrolls the content to keep it in the same place when inserting/removing a panel.