dont preserve inline formatting on enter

rarely what people want from UX perspective

modules/keyboard.js

@@ -512,11 +512,7 @@ function handleDeleteRange(range) {
   this.quill.focus();
 }
 
-// TODO use just updateContents()
 function handleEnter(range, context) {
-  if (range.length > 0) {
-    this.quill.scroll.deleteAt(range.index, range.length); // So we do not trigger text-change
-  }
   const lineFormats = Object.keys(context.format).reduce((formats, format) => {
     if (
       this.quill.scroll.query(format, Scope.BLOCK) &&
@@ -526,17 +522,13 @@ function handleEnter(range, context) {
     }
     return formats;
   }, {});
-  this.quill.insertText(range.index, '\n', lineFormats, Quill.sources.USER);
-  // Earlier scroll.deleteAt might have messed up our selection,
-  // so insertText's built in selection preservation is not reliable
+  const delta = new Delta()
+    .retain(range.index)
+    .delete(range.length)
+    .insert('\n', lineFormats);
+  this.quill.updateContents(delta, Quill.sources.USER);
   this.quill.setSelection(range.index + 1, Quill.sources.SILENT);
   this.quill.focus();
-  Object.keys(context.format).forEach(name => {
-    if (lineFormats[name] != null) return;
-    if (Array.isArray(context.format[name])) return;
-    if (name === 'link') return;
-    this.quill.format(name, context.format[name], Quill.sources.USER);
-  });
 }
 
 function makeCodeBlockHandler(indent) {