Inappropriate quoting in listing and literal blocks

[pjanx]

Current master (7050c34):

 <b>*</b> &apos; &amp;

```
<b>*</b> &apos; &amp;
```

gives

<div class="literalblock">
<div class="content">
<pre><b>*</b> &apos; &amp;</pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code>&lt;b&gt;*&lt;/b&gt; &amp;apos; &amp;</code></pre>
</div>
</div>

i.e., in the browser:

* ' &

<b>*</b> &apos; &

Asciidoctor:

<div class="literalblock">
<div class="content">
<pre>&lt;b&gt;*&lt;/b&gt; &amp;apos; &amp;amp;</pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code>&lt;b&gt;*&lt;/b&gt; &amp;apos; &amp;amp;</code></pre>
</div>
</div>

[xcoulon]

thanks for reporting this @pjanx, I will take a look at it

[xcoulon]

I suspect this is due to the way literal blocks are parsed (or their lack of support for substitutions)

[xcoulon]

@pjanx sorry for the late response, I was caught in #558 🤯

I believe that with the work done for #558 and #597, the issue your reported was fixed.
With the following source:

<b>*</b> &apos; &amp;

```
<b>*</b> &apos; &amp;
```

we now have the following output:

<div class="paragraph">
<p>&lt;b&gt;*&lt;/b&gt; &amp;apos; &amp;amp;</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code>&lt;b&gt;*&lt;/b&gt; &amp;apos; &amp;amp;</code></pre>
</div>
</div>

This is what #758 verifies.