Incorrect replace functionality if replcement text contains line break (\n)

[AAbakumov]

Replace functionality with all content selected using document.execCommand('insertText', false, 'Hello.\nTest.') works incorrectly. This type of insertion is used by third-party developers to programmatically insert text into the editor.

Steps for Reproduction

1. Visit quilljs.com
2. Press Ctrl/Cmd+A to select all the editor content
3. Open developer tool
4. Use the next command: document.execCommand('insertText', false, 'Hello.\nTest.')

Expected behavior: is to see Hello. Test.

Actual behavior: the inserted text is cut ('Hello.')

Platforms: All

Version: 2.0.2