vue file has two style(lang="stylus") format wrong

[sheepdragon]

Info

• Platform: Win
• Vetur version:0.11.7
• VS Code version:1.21.1

Problem

before formatting：

after formatting:

The two style became the same

[HerringtonDarkholme]

We currently don't support multiple style blocks.

Please also see #430

[gooqiao]

Hopefully it can be supported because it does not violate the vue style guide, and it does have its actual effect.
for example:
I have a page with a dialog on the page. I wrote the dialog for this page as a component. However, there is something on the dialog that is the same as on the page. Assuming I use the style tag with scoped, I will have to write it both in the dialog component and in the page component.

[octref]

Related to #532 too.

[ghost]

same as #499

[octref]

Tracked in #499.

[octref]

Tracked in #499.