Math blocks don't scale

[tosaba]

For the current version, equations are not scaled anymore to fit the size of the slide. Probably this issue is related to marp-core functionality, but for me, this appears within vs-code.
In the documentation of marp-core, it's written that the auto-scaling does not work with the uncover-theme. I am using theme: default.
It does not matter whether any [bg right] image is included on the slide or not.

Thanks!

# Some title

Eq. that fits into one line (no block) 
$S_1 = C_0 + n S_3$


Eq. that doesn't fit into one line (block)
$$S_1-S_3 = C_0 + \left(1-n\right)P_p - \left(1-n\right)S_3$$

Eq. that doesn't fit into one line (no block)
$S_1-S_3 = C_0 + \left(1-n\right)P_p - \left(1-n\right)S_3$

![bg right](test.png)

[yhatt]

As same as #8, it would be caused by a rendering bug in the old Chromium version in VS Code (Electron 3.x / Chrome 66). It displays correctly on VS Code for exploration (based on Electron 4.x / Chrome 69: microsoft/vscode#61787).

Waiting to update of VS Code is the only thing that we can do, but unfortunelly an update to Electron 4 is still blocked (microsoft/vscode#61787 (comment)).

For a while, use Marp CLI's preview mode as a workaround.

npx @marp-team/marp-cli --preview your-markdown.md

[yhatt]

Now VS Code 1.36-insider is using Electron 4. It would resolve scaling issue. (But there is another issue: #45)

[yhatt]

Now VS Code v1.36 reaches to stable.