undo and redo operations are now wrapped with withoutNormalizing call to prevent normalizing occuring in between application or reversal of batched operations (#2462)

packages/slate/src/commands/on-history.js

@@ -75,6 +75,7 @@ Commands.redo = editor => {
   if (!batch) return
 
   editor.withoutSaving(() => {
+    editor.withoutNormalizing(() => {
       // Replay the batch of operations.
       batch.forEach(op => {
         const { type, properties } = op
@@ -94,6 +95,7 @@ Commands.redo = editor => {
       const newData = data.set('undos', undos).set('redos', redos)
       editor.setData(newData)
     })
+  })
 }
 
 /**
@@ -111,6 +113,7 @@ Commands.undo = editor => {
   if (!batch) return
 
   editor.withoutSaving(() => {
+    editor.withoutNormalizing(() => {
       // Replay the inverse of the previous operations.
       batch
         .slice()
@@ -134,6 +137,7 @@ Commands.undo = editor => {
       const newData = data.set('undos', undos).set('redos', redos)
       editor.setData(newData)
     })
+  })
 }
 
 /**