Issue with HTML Diff Visualization (em and strong tags)

[moe-khan123]

Hi, great library and it works well in most text scenarios. I have found a scenario where it broke.

Old Text: Canadian artists and artistic groups by encouraging
New Text: <em>Canadian </em><strong>artists and artistic groups by encouraging
Result: <em><ins class='mod'>Canadian </em><strong>artists and artistic groups by encouraging

Expected Result: <em><ins class='mod'>Canadian </em><strong>artists and artistic groups by encouraging </ins>

Currently, the browser automatically closes the ins tag after the word "Canadian". There is no closing ins tag. the whole sentence should be highlighted in a light brown colour because the new text has bolds and italics in there.