Markdown Incorrect Colorization of Fenced Code Blocks

[azu]

• VSCode Version: Code 1.8.1 (ee428b0, 2016-12-19T14:42:49.304Z)
• OS Version: Darwin x64 15.6.0

Put some text before fenced Code Blocks and break syntax highlight of code block.

OK:

# Arbitrary Piece of code

```c
#include <stdio.h>

int main(void)
{
    puts("hello world");
    return 0;
}
```

NG:

# Arbitrary Piece of code

text <= break syntax highlight
```c
#include <stdio.h>

int main(void)
{
    puts("hello world");
    return 0;
}
```

This case is CommonMark spec's Example 108.

Other blocks can also occur before and after fenced code blocks without an intervening blank line:
http://spec.commonmark.org/0.26/#example-108

[mjbvz]

Closing as duplicate of #12946