Update 2020/ferguson[12]

Surprise, surprise there are more updates on my entries! :-) But to be
fair to me there were some important fixes and I had not really gone
through the README files of these entries (I still didn't go through all
of them thoroughly and probably won't since I'm far too concise :-)
:-)). In fact some of these problems broke some of the features of some
of the entries.

In 2020/ferguson1: termcaps must be compiled by make all. It also needed
a make test rule that runs ./termcaps. As well it needed a play and
snake-colours rule which copies and chmod +x the respective .sh files.

There were some typo fixes here and there as well as (I hope) a bit
clearer wording.

Some out of date things were changed.

2020/ferguson1/gameplay.html

@@ -71,7 +71,7 @@ for the input keys.</p>
 <li><p><a href="#preset">Automate the above gameplay modes</a></p></li>
 </ul>
 </li>
-<li><p><a href="#variables">Game variables</a></p>
+<li><p><a href="#variables">Notes about some of the game variables</a></p>
 
 <ul>
 <li><p><a href="#wait">WAIT         -   Snake speed</a></p></li>
@@ -769,14 +769,14 @@ you choose uses then the script will override what you pass in.</p>
 <pre><code>    WALLS=0 ./play.sh
 </code></pre>
 
-<h1>6. <a name="variables" href="#toc">Game variables</a></h1>
+<h1>6. <a name="variables" href="#toc">Notes about some of the game variables</a></h1>
 
 <p>The game variables can be used for a variety of things including different
-gameplay modes as above but here are some notes about a few of them.</p>
+gameplay modes (as shown above) but here are some notes about a few of them.</p>
 
 <h2><a name="wait" href="#toc">WAIT: Snake speed</a></h2>
 
-<p>Besides the different game modes if you find it too fast/slow you can change it
+<p>Besides the different game modes, if you find it too fast/slow you can change it
 to a value that&rsquo;s better for you. Remember it&rsquo;s a wait time so if you want the
 snake to move slower you have to increase the wait time!</p>