ianstormtaylor/slate slate@0.140.0 on GitHub

#6304 cbc9586 Thanks @dylans! - Insert the empty text required by normalization when fragment replacement leaves an insertion point at a block-leading or trailing inline. Resolve the adjacent text within the block so insertion stays there and works before emptied containers normalize.
An invalid mergeNodes call combining block children with text or inline children now throws with both node paths instead of allowing normalization to discard content. Empty children, text-node merges and the previous-node removal policy keep their existing behavior.