2015-06-23: srfi: use the factorial example in the abstract.

srfi: use the factorial example in the abstract.

diff --git a/docs/srfi-from-template.html b/docs/srfi-from-template.html
--- a/docs/srfi-from-template.html
+++ b/docs/srfi-from-template.html
@@ -63,19 +63,30 @@ It resolves a limitation of <a href="htt
 Wisp expressions can include any s-expressions and as such provide backwards compatibility.
 </p>
 
+<blockquote>
 <table><tr><th>wisp</th><th>s-exp</th></tr><tr><td>
-<pre><b>define</b> : <i>hello</i> who   
-         <i>format</i> #t "Hello ~A!\n"  
-                        . who   
-<i>hello</i> "Wisp"        
+<pre>
+<b>define</b> : <i>factorial</i> n
+__  <b>if</b> : <i>zero?</i> n
+____   . 1
+____   <i>*</i> n : <i>factorial</i> (- n 1)
+
+<i>display</i> : <i>factorial</i> 5 
+<i>newline</i>
 </pre>
+</blockqote>
 </td><td>
-<pre>(<b>define</b> (<i>hello</i> who)
-        (<i>format</i> #t "Hello ~A!\n"
-                          who))
-(<i>hello</i> "S-exp")
+<pre>
+(<b>define</b> (<i>factorial</i> n)
+    (<b>if</b> (<i>zero?</i> n)
+       1
+       (<i>*</i> n (<i>factorial</i> (- n 1)))))
+
+(<i>display</i> (<i>factorial</i> 5))
+(<i>newline</i>)
 </pre>
 </td></tr></table>
+</blockquote>
 
 <H1>Rationale</H1>
 
@@ -130,7 +141,7 @@ Wisp expressions can include any s-expre
 
 <h2>Wisp example</h2>
 
-Since an example speaks more than a hundred explanations, the following shows wisp exploiting all its features - including curly-infix from <a href="http://srfi.schemers.org/srfi-105/srfi-105.html">SRFI 105</a>:
+Since an example speaks more than a hundred explanations, the following shows wisp exploiting all its features - including compatibility with curly-infix from <a href="http://srfi.schemers.org/srfi-105/srfi-105.html">SRFI 105</a>:
 
 <blockquote>
 <pre>