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diff --git a/articles/xerl-0.4-expression-separator/index.html b/articles/xerl-0.4-expression-separator/index.html
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--- a/articles/xerl-0.4-expression-separator/index.html
+++ b/articles/xerl-0.4-expression-separator/index.html
@@ -7,7 +7,7 @@
     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.17" />
+    <meta name="generator" content="Hugo 0.26" />
 
     <title>Nine Nines: Xerl: expression separator</title>
 
@@ -74,58 +74,58 @@
 	</p>
 </header>
 
-<div class="paragraph"><p>As promised we are adding an expression separator this time.

-This will be short and easy.</p></div>

-<div class="paragraph"><p>In the tokenizer we only need to add a line recognizing the

-comma as a valid token.</p></div>

-<div class="listingblock">

-<div class="content"><!-- Generator: GNU source-highlight 3.1.8

-by Lorenzo Bettini

-http://www.lorenzobettini.it

-http://www.gnu.org/software/src-highlite -->

-<pre><tt>, <span style="color: #990000">:</span> {<span style="color: #FF6600">token</span>, {<span style="color: #FF6600">','</span>, <span style="color: #009900">TokenLine</span>}}<span style="color: #990000">.</span></tt></pre></div></div>

-<div class="paragraph"><p>Then we need to change the following lines in the parser:</p></div>

-<div class="listingblock">

-<div class="content"><!-- Generator: GNU source-highlight 3.1.8

-by Lorenzo Bettini

-http://www.lorenzobettini.it

-http://www.gnu.org/software/src-highlite -->

-<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span>

-<span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">exprs</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span> | <span style="color: #FF6600">'$2'</span>]<span style="color: #990000">.</span></tt></pre></div></div>

-<div class="paragraph"><p>And add a comma between the expressions on the second line:</p></div>

-<div class="listingblock">

-<div class="content"><!-- Generator: GNU source-highlight 3.1.8

-by Lorenzo Bettini

-http://www.lorenzobettini.it

-http://www.gnu.org/software/src-highlite -->

-<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span>

-<span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">','</span> <span style="color: #FF6600">exprs</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span> | <span style="color: #FF6600">'$3'</span>]<span style="color: #990000">.</span></tt></pre></div></div>

-<div class="paragraph"><p>That takes care of everything except the optional trailing

-comma at the end of our lists of expressions. We just need an

-additional rule to take care of this.</p></div>

-<div class="listingblock">

-<div class="content"><!-- Generator: GNU source-highlight 3.1.8

-by Lorenzo Bettini

-http://www.lorenzobettini.it

-http://www.gnu.org/software/src-highlite -->

-<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">','</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span></tt></pre></div></div>

-<div class="paragraph"><p>That&#8217;s it.</p></div>

-<div class="paragraph"><p>Wondering why we don&#8217;t have this optional trailing comma in

-Erlang considering how easy it was and the number of people

-complaining about it? Yeah, me too. But that&#8217;s for someone else

-to answer.</p></div>

-<div class="paragraph"><p>Another change I want to talk about is a simple modification

-of the compiler code to use an <code>#env{}</code> record for

-tracking state instead of passing around individual variables.

-This will be required later on when we make modules into proper

-expressions so I thought it was a good idea to anticipate.</p></div>

-<div class="ulist"><ul>

-<li>

-<p>

-<a href="https://github.com/extend/xerl/blob/0.4/">View the source</a>

-</p>

-</li>

-</ul></div>

+<div class="paragraph"><p>As promised we are adding an expression separator this time.
+This will be short and easy.</p></div>
+<div class="paragraph"><p>In the tokenizer we only need to add a line recognizing the
+comma as a valid token.</p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 3.1.8
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>, <span style="color: #990000">:</span> {<span style="color: #FF6600">token</span>, {<span style="color: #FF6600">','</span>, <span style="color: #009900">TokenLine</span>}}<span style="color: #990000">.</span></tt></pre></div></div>
+<div class="paragraph"><p>Then we need to change the following lines in the parser:</p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 3.1.8
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span>
+<span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">exprs</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span> | <span style="color: #FF6600">'$2'</span>]<span style="color: #990000">.</span></tt></pre></div></div>
+<div class="paragraph"><p>And add a comma between the expressions on the second line:</p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 3.1.8
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span>
+<span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">','</span> <span style="color: #FF6600">exprs</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span> | <span style="color: #FF6600">'$3'</span>]<span style="color: #990000">.</span></tt></pre></div></div>
+<div class="paragraph"><p>That takes care of everything except the optional trailing
+comma at the end of our lists of expressions. We just need an
+additional rule to take care of this.</p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 3.1.8
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt><span style="color: #FF6600">exprs</span> <span style="color: #990000">-&gt;</span> <span style="color: #FF6600">expr</span> <span style="color: #FF6600">','</span> <span style="color: #990000">:</span> [<span style="color: #FF6600">'$1'</span>]<span style="color: #990000">.</span></tt></pre></div></div>
+<div class="paragraph"><p>That&#8217;s it.</p></div>
+<div class="paragraph"><p>Wondering why we don&#8217;t have this optional trailing comma in
+Erlang considering how easy it was and the number of people
+complaining about it? Yeah, me too. But that&#8217;s for someone else
+to answer.</p></div>
+<div class="paragraph"><p>Another change I want to talk about is a simple modification
+of the compiler code to use an <code>#env{}</code> record for
+tracking state instead of passing around individual variables.
+This will be required later on when we make modules into proper
+expressions so I thought it was a good idea to anticipate.</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+<a href="https://github.com/extend/xerl/blob/0.4/">View the source</a>
+</p>
+</li>
+</ul></div>
 
 </article>
 </div>
@@ -134,55 +134,107 @@ expressions so I thought it was a good idea to anticipate.</p></div>
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