Merged line table

[muyoungko]

Thanks for useful library. It is very helpful.

But there was line issue under table with merged cell

I added test code and input and output xlsx

input xlsx

output xlsx

-code explanation-
There are merged cell B8:C8
But tail cells like C8 was not added at newly added table row.
I added some code to add tail cells

Please check my code thanks

[kant2002]

I love contribution with tests. Thank you!

[kant2002]

Please check 1,4,4