Improve links to bugs.html in README.md files

In other words rather than have the link name in the form of:

    1984 decot bugs

it is now:

    1984/decot in bugs.html

so that it matches how the entry itself looks (as in how it's
identified) and to say where (what file) it is (in). The reason it says
'in bugs.html' rather than 'bugs' (saying that the entry has bugs) is
because not all are bugs and it's saying where to see it anyway. But
some are features, others are missing links or files or other things
like that and to keep the same form it now says 'in bugs.html'.

This was done with my sgit(1) tool like:

    sgit -e 's,\([0-9][0-9][0-9][0-9]\) \([-a-z\.0-9]*\) bugs,\1/\2 in bugs.html,g' '*/*md'

The link to bugs.html itself has the path '../../bugs.html'. This is
important as it's meant to be rendered in the browser. At first this was
not remembered and I did something like:

    sgit -e 's,\[\([0-9][0-9][0-9][0-9]\) \([-a-z\.0-9]*\) bugs\](../../bugs.html,\[\1/\2 in bugs.html\](%%REPO_URL%%/bugs.html,g' '*/*md'

but this was changed to the simpler one due to the problem described
above. It's worth putting this note here as a reminder, though, so I
have included it here.

2019/duble/index.html

@@ -402,7 +402,7 @@ See <a href="#alternate-code">Alternate code</a> below if you are curious.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>
 <pre><code>    STATUS: INABIAF - please **DO NOT** fix</code></pre>
-<p>For more detailed information see <a href="../../bugs.html#2019_duble">2019 duble bugs</a>.</p>
+<p>For more detailed information see <a href="../../bugs.html#2019_duble">2019/duble in bugs.html</a>.</p>
 <h2 id="to-use">To use:</h2>
 <pre><code>    ./prog file</code></pre>
 <h2 id="try">Try:</h2>
@@ -435,10 +435,10 @@ the editor.</p>
 will have to be killed from another shell session or by closing the terminal tab
 (in other words don’t do this from the console!). If the file cannot be opened
 in the beginning this will also happen. This is discussed in
-<a href="../../bugs.html#2019_duble">2019 duble bugs</a>.</p>
+<a href="../../bugs.html#2019_duble">2019/duble in bugs.html</a>.</p>
 <p>NOTE: this entry might leave sockets lying about in the current working
 directory which you’ll have to delete manually. This is also discussed in
-<a href="../../bugs.html#2019_duble">2019 duble bugs</a>.</p>
+<a href="../../bugs.html#2019_duble">2019/duble in bugs.html</a>.</p>
 <h2 id="alternate-code">Alternate code:</h2>
 <p>An alternate version of this entry, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2019/duble/prog.alt.c">prog.alt.c</a>, is provided. This
 alternate code might not work as well in macOS.</p>