Fix detecting text mutations when the character added is the same as its neighbor
Fix detecting text mutations when the character added is the same as its neighbor

basecamp/trix,urossmolnik/trix,basecamp/trix,GabiGrin/trix,basecamp/trix,basecamp/trix,ChenMichael/trix,GabiGrin/trix,ChenMichael/trix,GabiGrin/trix,ChenMichael/trix,urossmolnik/trix,urossmolnik/trix