Change 'hyphens: none;' to 'hyphens: manual;'

.. per a comment on GitHub suggesting none is not wanted. Again maybe it
needs to be in a different section or even different html element but
this seems to solve the problem anyway and can be experimented with.

ioccc.css

@@ -21,7 +21,7 @@ p {
     -moz-hyphens: none;
     -ms-hyphens: none;
     -webkit-hyphens: none;
-    hyphens: none;
+    hyphens: manual;
 }
 
 /* Sections ========================================================================== */