fix alignment and HTML bug

Fixed the alignment of an arrow in `markdown.md`.

Fixed an HTML error, caught by `make quick_www`, in `bin/README.md`.

bin/README.md

@@ -559,6 +559,7 @@ This tool is used in the [bin/md2html.cfg](%%REPO_URL%%/bin/md2html.cfg) file.
 
 <div id="subst-entry-index">
 ### [subst.entry-index.sh](%%REPO_URL%%/bin/subst.entry-index.sh)
+</div>
 
 Print substitutions for an entry's `index.html`.
 

bin/index.html

@@ -678,6 +678,7 @@ We sort with lines starting with <code>!</code> fourth.</p>
 <p>This tool is used in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/bin/md2html.cfg">bin/md2html.cfg</a> file.</p>
 <div id="subst-entry-index">
 <h3 id="subst.entry-index.sh"><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/bin/subst.entry-index.sh">subst.entry-index.sh</a></h3>
+</div>
 <p>Print substitutions for an entry’s <code>index.html</code>.</p>
 <p>This tool is used in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/bin/md2html.cfg">bin/md2html.cfg</a> file.</p>
 <div id="subst-entry-navbar-awk">

markdown.html

@@ -436,7 +436,7 @@ for the given page URL.</p>
 <h2 id="please-do-not-use-unindented-code-blocks">Please do NOT use unindented code blocks</h2>
 <p>Please do <strong>NOT</strong> start code blocks at the left-hand edge.</p>
 <pre><code>```
-This code block is NOT indented                   &lt;=== no thank you
+This code block is NOT indented                                 &lt;=== no thank you
 ```</code></pre>
 <p>We request that you indent the code block by 4 spaces:</p>
 <pre><code>```

markdown.md

@@ -119,7 +119,7 @@ Please do **NOT** start code blocks at the left-hand edge.
 
 ````
 ```
-This code block is NOT indented                   <=== no thank you
+This code block is NOT indented                   		<=== no thank you
 ```
 ````