fix occasional range error

[emilia-friedberg]

Include the node.length in the getSafeCaretPosition function in order to solve IndexError that was arising out of an invalid range length in the instance where the state's value is longer than the length of the node in the ref.

[ashleyw]

Hi Emilia,

Would it be possible to add a test case demonstrating the error?

Thanks! — Ash

[emilia-friedberg]

@ashleyw I added a test that I hope clarifies the error I was experiencing! Let me know if you have questions.