def reply_to_comment(buf, (row, col)):
    depth = LineProperties(buf[row - 1]).depth
    row, col = find_subthread_end(buf, (row, col))
    return inject_comment(buf, (row, col), depth=depth + 1)
Inserts a new reply to the current diffscuss comment at a depth one greater
dataset/ETHPy150Open hut8labs/diffscuss/diffscuss/support/editor.py/reply_to_comment