The repl coommand may have a parameter

Without parameter, it gives help on REPL commands. Otherwise, it is equivalent
to calling help on its parameter.

    stklos> ,h cadr  (will display the help on cadr)
    stklos> ,h (will display all the REPL commands)

doc/HTML/stklos-ref.html

@@ -14538,7 +14538,7 @@ <h4 id="_system_information">4.13.5. System Information</h4>
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-<pre class="rouge highlight"><code data-lang="scheme"><span class="p">(</span><span class="nf">features</span><span class="p">)</span> <span class="nv">=&gt;</span> <span class="p">(</span><span class="nf">STklos</span> <span class="nv">STklos-2</span><span class="o">.</span><span class="mi">00</span> <span class="nv">exact-complex</span>
+<pre class="rouge highlight"><code data-lang="scheme"><span class="p">(</span><span class="nf">features</span><span class="p">)</span> <span class="nv">=&gt;</span> <span class="p">(</span><span class="nf">STklos</span> <span class="nv">STklos-2</span><span class="o">.</span><span class="mf">00.20</span> <span class="nv">exact-complex</span>
                <span class="nv">ieee-float</span> <span class="nv">full-unicode</span> <span class="nv">ratios</span> <span class="nv">little-endian</span> <span class="o">...</span><span class="p">)</span></code></pre>
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