Custom behavior for the enter key + list formats

src/core/format.coffee

@@ -69,12 +69,14 @@ class Format
     bullet:
       type: Format.types.LINE
       exclude: 'list'
+      inherit: true
       parentTag: 'UL'
       tag: 'LI'
 
     list:
       type: Format.types.LINE
       exclude: 'bullet'
+      inherit: true
       parentTag: 'OL'
       tag: 'LI'
 

src/modules/keyboard.coffee

@@ -66,7 +66,22 @@ class Keyboard
       return true unless range?
       [line, offset] = @quill.editor.doc.findLineAt(range.start)
       [leaf, offset] = line.findLeafAt(offset)
-      delta = new Delta().retain(range.start).insert('\n', line.formats).delete(range.end - range.start)
+      delta = new Delta().retain(range.start)
+
+      # hitting enter on an empty line formatted as a list should remove the format
+      if range.isCollapsed() and line.length == 1 and (line.formats.bullet or line.formats.list)
+        delta.retain(1, { list: false, bullet: false })
+      else
+        delta.insert('\n', line.formats).delete(range.end - range.start)
+
+      # remove line formats from the new line that should not be inherited
+      delta.retain(1, _.reduce(line.formats, (formats, value, name) =>
+        format = @quill.editor.doc.formats[name]
+        if format and format.isType('line') and !format.config.inherit
+          formats[name] = false
+        return formats
+      , {}))
+
       @quill.updateContents(delta, Quill.sources.USER)
       _.each(leaf.formats, (value, format) =>
         @quill.prepareFormat(format, value)