1. Can you merge inserts of characters into inserts of strings reliably given both the original inserts and the current document history? E.g. if the closed set

1. Can you merge inserts of characters into inserts of strings reliably given both the original inserts and the current document history? E.g. if the closed set of history that only inserts in the middle of the subset of inserts that you want to turn into a string those inserts can be permanently merged into a string insert. 2. String merging should also allow null merges, e.g. identity the same closed set of history inserts that refer to only the inside of the original inserts, and so permanently deleting history of characters in the document could be replaced with a null insert that can still be referred to by other inserts/merges.