Format markdown code blocks

[mbomb007]

I'm using the Monokai theme in both VS Code and Sublime Text 3. In Sublime, the code blocks are distinguishable from regular text easily. In VS Code, not so much. Not only is the syntax not highlighted, but the block itself is the same background color (see the first block, where I didn't set the language to bash).

Sublime Monokai:

VS Code Monokai:

Is this something you can fix? Or is this an issue with a language extension, and would therefore need to be reported somewhere else?