Simplify markdown.html

In the case of html void elements (not having the trailing '/') I have
merged the 'no thank you' and 'instead use'. At the same time I fixed a
typo where one 'no thank you' referred to the wrong 'instead use' (in
particular it was '<hr/>' -> '<br>' rather than '<hr/>' -> '<hr>').

markdown.html

@@ -658,25 +658,22 @@ elements</a>.</p>
 tags</a>.</p>
 <p>The trailing slash on void HTML elements has no effect and interacts badly with
 unquoted attribute values.</p>
-<p>For example, please do <strong>NOT</strong> use:</p>
-<pre><code>    &lt;br/&gt;                                                     &lt;=== no thank you</code></pre>
-<p>Instead use just:</p>
-<pre><code>    &lt;br&gt;</code></pre>
-<p>And for example, please do <strong>NOT</strong> use:</p>
-<pre><code>    &lt;hr/&gt;                                                     &lt;=== no thank you</code></pre>
-<p>Instead use just:</p>
-<pre><code>    &lt;br&gt;</code></pre>
-<p>and</p>
-<pre><code>    &lt;hr&gt;</code></pre>
-<p>And for example, please do <strong>NOT</strong> use:</p>
-<pre><code>    &lt;img src=&quot;1984-anonymous-tattoo.jpg&quot;
+<p>For example, please do <strong>NOT</strong> use markdown like these:</p>
+<pre><code>    &lt;br/&gt;                                                     &lt;=== no thank you
+
+    &lt;hr/&gt;                                                     &lt;=== no thank you
+
+    &lt;img src=&quot;1984-anonymous-tattoo.jpg&quot;
      alt=&quot;image of a tattoo of the 1984 anonymous C code&quot;
      width=600 height=401 /&gt;                                  &lt;=== no thank you</code></pre>
-<p>Instead use just:</p>
-<pre><code>    &lt;img src=&quot;1984-anonymous-tattoo.jpg&quot;
+<p>Instead use, respectively:</p>
+<pre><code>    &lt;br&gt;
+
+    &lt;hr&gt;
+
+    &lt;img src=&quot;1984-anonymous-tattoo.jpg&quot;
      alt=&quot;image of a tattoo of the 1984 anonymous C code&quot;
      width=600 height=401&gt;</code></pre>
-<p>etc.</p>
 <p>Jump to: <a href="#">top</a></p>
 <div id="backslash">
 <div id="br">

markdown.md

@@ -396,54 +396,30 @@ tags](https://github.com/validator/validator/wiki/Markup-»-Void-elements#traili
 The trailing slash on void HTML elements has no effect and interacts badly with
 unquoted attribute values.
 
-For example, please do **NOT** use:
+For example, please do **NOT** use markdown like these:
 
 ``` <!---html-->
     <br/>                                                     <=== no thank you
-```
 
-Instead use just:
-
-``` <!---html-->
-    <br>
-```
-
-And for example, please do **NOT** use:
-
-``` <!---html-->
     <hr/>                                                     <=== no thank you
-```
 
-Instead use just:
-
-``` <!---html-->
-    <br>
-```
-
-and
-
-``` <!---html-->
-    <hr>
-```
-
-And for example, please do **NOT** use:
-
-``` <!---html-->
     <img src="1984-anonymous-tattoo.jpg"
      alt="image of a tattoo of the 1984 anonymous C code"
      width=600 height=401 />                                  <=== no thank you
 ```
 
-Instead use just:
+Instead use, respectively:
 
 ``` <!---html-->
+    <br>
+
+    <hr>
+
     <img src="1984-anonymous-tattoo.jpg"
      alt="image of a tattoo of the 1984 anonymous C code"
      width=600 height=401>
 ```
 
-etc.
-
 Jump to: [top](#)
 
 <div id="backslash">