When indent an item within a numbered list, it starts a letter sequence instead of number.

It's not possible to have nested numbered lists using numbers. When we indent an item within a numbered list, it starts a letter sequence instead of number.

With the new improvement we would have

{ 1. item 1 1. item 1.1 2. item 1.2 2. item 2 }

The actual behavior:

{ 1. item 1 a. item 1.a b. item 1.b 2. item 2 }