fix internal links in 2012/zeitak/dorssel.html

Fixed internal links.

Ran `bin/readme2index.sh -v 1 2012/zeitak` to perform the above.

2012/zeitak/README.md

@@ -15,7 +15,7 @@ code](#alternate-code) below.
 ```
 
 where `file` is the file to be checked for nesting errors. For example, you may
-try [incorrect.c](incorrect.c) and the program itself. You may also run it on
+try [incorrect.c](%%REPO_URL%%/2012/zeitak/incorrect.c) and the program itself. You may also run it on
 text files that are not code.
 
 
@@ -31,7 +31,7 @@ will not detect multiple issues.
 
 ## Alternate code:
 
-The alternate code, [zeitak.alt.c](zeitak.alt.c), is a version that was slightly
+The alternate code, [zeitak.alt.c](z%%REPO_URL%%/2012/zeitak/eitak.alt.c), is a version that was slightly
 deobfuscated by the author. You may find reading it helpful in your attempt to
 understand this extremely subtle entry.
 

2012/zeitak/index.html

@@ -159,14 +159,14 @@ code</a> below.</p>
 <h2 id="to-use">To use:</h2>
 <pre><code>    ./zeitak &lt; file</code></pre>
 <p>where <code>file</code> is the file to be checked for nesting errors. For example, you may
-try <a href="incorrect.c">incorrect.c</a> and the program itself. You may also run it on
+try <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/incorrect.c">incorrect.c</a> and the program itself. You may also run it on
 text files that are not code.</p>
 <h2 id="try">Try:</h2>
 <pre><code>    make test</code></pre>
 <p>NOTE: the program prints an error and exits on the first nesting error so it
 will not detect multiple issues.</p>
 <h2 id="alternate-code">Alternate code:</h2>
-<p>The alternate code, <a href="zeitak.alt.c">zeitak.alt.c</a>, is a version that was slightly
+<p>The alternate code, <a href="zhttps://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/eitak.alt.c">zeitak.alt.c</a>, is a version that was slightly
 deobfuscated by the author. You may find reading it helpful in your attempt to
 understand this extremely subtle entry.</p>
 <h3 id="alternate-build">Alternate build:</h3>