When repeated style value is present, getFormat() returns empty object

[Dora1604]

Hi!
Firstly, thanks for the great editor. It helped me a lot in my current project.
I have noticed an unexpected behavior when detecting style format. When repeated style value is present, getFormat() returns an empty object.

For example, having html like this:

<span style="font-size:12px">Lo</span>
<span style="font-size:16px">re</span>
<span style="font-size:12px">m</span>

produces getFormat (with selected all html above) output :

Actual behavior

 {} 

Expected behavior

 {"fontSize": ["12px", "16px"] }

while html like this:

<span style="font-size:12px">Lo</span>
<span style="font-size:16px">re</span>

produces getFormat (with selected all html above) output:

{"fontSize": ["12px", "16px"]}

I think repeated style format should either be added multiple times or just once, but should not produce empty object output.

Platform

Windows 10, Edge version 89.0.774.75

Quill version

1.3.7.