Last backtick appears to escape in fenced code blocks

[nehbit]

Hi there,

Thanks for spending the time to make this! This is super useful, and the extensibility is a great feature not easily found elsewhere. I had one issue, I'm not sure if this is a bug or a side effect, but here it goes. In fenced code blocks, it appears that the last backtick escapes.

So, for example:

    ```
    function lorem(ipsum, dolor = 1) {
      const sit = ipsum == null ? 0 : ipsum.sit;
      dolor = sit - amet(dolor);
      return sit ? consectetur(ipsum, 0, dolor < 0 ? 0 : dolor) : [];
    }

    function adipiscing(...elit) {
      if (!elit.sit) {
        return [];
      }
    
      const sed = elit[0];
      return eiusmod.tempor(sed) ? sed : [sed];
    }

    function incididunt(ipsum, ut = 1) {
      ut = labore.et(amet(ut), 0);
      const sit = ipsum == null ? 0 : ipsum.sit;

      if (!sit || ut < 1) {
        return [];
      }

      let dolore = 0;
      let magna = 0;
      const aliqua = new eiusmod(labore.ut(sit / ut));

      while (dolore < sit) {
        aliqua[magna++] = consectetur(ipsum, dolore, (dolore += ut));
      }
    
      return aliqua;
    }
    ```

Ends up being rendered as:
——————————————————————————————

function lorem(ipsum, dolor = 1) {
  const sit = ipsum == null ? 0 : ipsum.sit;
  dolor = sit - amet(dolor);
  return sit ? consectetur(ipsum, 0, dolor < 0 ? 0 : dolor) : [];
}

function adipiscing(...elit) {
  if (!elit.sit) {
    return [];
  }

  const sed = elit[0];
  return eiusmod.tempor(sed) ? sed : [sed];
}

function incididunt(ipsum, ut = 1) {
  ut = labore.et(amet(ut), 0);
  const sit = ipsum == null ? 0 : ipsum.sit;

  if (!sit || ut < 1) {
    return [];
  }

  let dolore = 0;
  let magna = 0;
  const aliqua = new eiusmod(labore.ut(sit / ut));

  while (dolore < sit) {
    aliqua[magna++] = consectetur(ipsum, dolore, (dolore += ut));
  }

  return aliqua;
}

`
——————————————————————————————
^ superfluous last backtick

This is the actual code fragment that is generated by above:

<pre style="color:#93a1a1;background-color:#002b36"><span style="color:#268bd2">function</span> lorem(ipsum, dolor <span style="color:#719e07">=</span> <span style="color:#2aa198">1</span>) {
  <span style="color:#268bd2">const</span> sit <span style="color:#719e07">=</span> ipsum <span style="color:#719e07">==</span> <span style="color:#cb4b16">null</span> <span style="color:#719e07">?</span> <span style="color:#2aa198">0</span> <span style="color:#719e07">:</span> ipsum.sit;
  dolor <span style="color:#719e07">=</span> sit <span style="color:#719e07">-</span> amet(dolor);
  <span style="color:#719e07">return</span> sit <span style="color:#719e07">?</span> consectetur(ipsum, <span style="color:#2aa198">0</span>, dolor <span style="color:#719e07">&lt;</span> <span style="color:#2aa198">0</span> <span style="color:#719e07">?</span> <span style="color:#2aa198">0</span> <span style="color:#719e07">:</span> dolor) <span style="color:#719e07">:</span> [];
}

<span style="color:#268bd2">function</span> adipiscing(...elit) {
  <span style="color:#719e07">if</span> (<span style="color:#719e07">!</span>elit.sit) {
    <span style="color:#719e07">return</span> [];
  }

  <span style="color:#268bd2">const</span> sed <span style="color:#719e07">=</span> elit[<span style="color:#2aa198">0</span>];
  <span style="color:#719e07">return</span> eiusmod.tempor(sed) <span style="color:#719e07">?</span> sed <span style="color:#719e07">:</span> [sed];
}

<span style="color:#268bd2">function</span> incididunt(ipsum, ut <span style="color:#719e07">=</span> <span style="color:#2aa198">1</span>) {
  ut <span style="color:#719e07">=</span> labore.et(amet(ut), <span style="color:#2aa198">0</span>);
  <span style="color:#268bd2">const</span> sit <span style="color:#719e07">=</span> ipsum <span style="color:#719e07">==</span> <span style="color:#cb4b16">null</span> <span style="color:#719e07">?</span> <span style="color:#2aa198">0</span> <span style="color:#719e07">:</span> ipsum.sit;

  <span style="color:#719e07">if</span> (<span style="color:#719e07">!</span>sit <span style="color:#719e07">||</span> ut <span style="color:#719e07">&lt;</span> <span style="color:#2aa198">1</span>) {
    <span style="color:#719e07">return</span> [];
  }

  <span style="color:#268bd2">let</span> dolore <span style="color:#719e07">=</span> <span style="color:#2aa198">0</span>;
  <span style="color:#268bd2">let</span> magna <span style="color:#719e07">=</span> <span style="color:#2aa198">0</span>;
  <span style="color:#268bd2">const</span> aliqua <span style="color:#719e07">=</span> <span style="color:#719e07">new</span> eiusmod(labore.ut(sit <span style="color:#719e07">/</span> ut));

  <span style="color:#719e07">while</span> (dolore <span style="color:#719e07">&lt;</span> sit) {
    aliqua[magna<span style="color:#719e07">++</span>] <span style="color:#719e07">=</span> consectetur(ipsum, dolore, (dolore <span style="color:#719e07">+=</span> ut));
  }

  <span style="color:#719e07">return</span> aliqua;
}
</pre><p>`</p>

Thanks for taking a look!

[yuin]

This issue looks like same as #28. I've fixed the issue in 65bf35a .

[nehbit]

Thank you! I'll circle back to confirm once I get this in.