fix internal links in 2004/vik1/index.html

Fix indentation of code blocks.

Ran `bin/readme2index.sh -v 1 2004/vik1` to perform the above.

2004/vik1/index.html

@@ -200,16 +200,16 @@ order as described below.</p>
 
     a   - Advanced racing in a winter landscape
     d   - Racing in at night in the dark
-#   - Race track selection 1-3 are valid numbers</code></pre>
+    #   - Race track selection 1-3 are valid numbers</code></pre>
 <p>Here are a few examples:</p>
-<pre><code>    Command line:               Description:
+<pre><code>    Command line:             Description:
 
-    $ ./vik1                    Run track 1 at daytime in the summer
-    $ ./vik1 a                  Run track 1 at daytime in the winter
-    $ ./vik1 d                  Run track 1 at night in the summer
-    $ ./vik1 3                  Run track 3 at daytime in the summer
-    $ ./vik1 d3                 Run track 3 at night in the summer
-    $ ./vik1 ad2                Run track 2 at night in the winter</code></pre>
+    ./vik1                    Run track 1 at daytime in the summer
+    ./vik1 a                  Run track 1 at daytime in the winter
+    ./vik1 d                  Run track 1 at night in the summer
+    ./vik1 3                  Run track 3 at daytime in the summer
+    ./vik1 d3                 Run track 3 at night in the summer
+    ./vik1 ad2                Run track 2 at night in the winter</code></pre>
 <p>Note that the order in which the argument characters are entered is
 important. It is for example not possible to type <code>./vik1 da</code>. (Well it is
 possible, but the result will not be as expected.)</p>