Undo/redo inconsistency when replacing chunk of content with multiple formats

[cutteroid]

Undo/redo chain become inconsistent when replacing chunk of editors content (wich has multiple formats) with text

1. Visit quilljs.com
2. Select all content in editor and input letter (Q for example)
3. Hit Undo
4. Hit Redo. Notice that q letter is now in code block
5. Hit Undo again. Notice how initial content has changed

Expected behavior: Undo/redo history works correctly

Actual behavior: Editor content is altered after some undo/redo operations

Version: 1.0.0-rc.2

Also on certain conditions i'm getting
Uncaught TypeError: Cannot read property 'mutations' of undefined
when replacing part of editors content with text in Chrome browser.
Maybe it is related to described undo/redo problem.

[sachinrekhi]

@jhchen In the commit fix you mention you made a change to the Delta format? Does that mean the rich-text Delta library changed to accommodate this change?

[jhchen]

No the editor's behavior is changed to exhibit what delta already does, so rich-text stays the same.