add checkmark to the narbar of all constructed HTML

We added a checkmark all narbar's that has the make effect of
clicking on the **Nu HTML check this web page** link at the very
bottom.  This makes it much more convenient when one needs
to quickly check the HTML of a number of web pages.

Run `make www` to perform the above.

1988/applin/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/applin/applin.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/applin/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fapplin%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.first.html -->

1988/dale/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/dale/dale.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/dale/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fdale%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/index.html

@@ -125,6 +125,7 @@
   <a class="Left" href="../years.html">&uarr; top &uarr;</a>
   <a class="Left" href="../1989/index.html">1989 &rarr;</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.year.mid.html -->

1988/isaak/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/isaak.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/isaak/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fisaak%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/litmaath/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/litmaath/litmaath.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/litmaath/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Flitmaath%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/phillipps/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/phillipps/phillipps.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/phillipps/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fphillipps%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/reddy/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/reddy/reddy.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/reddy/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Freddy%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/robison/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/robison/robison.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/robison/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Frobison%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/spinellis/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/spinellis/spinellis.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/spinellis/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fspinellis%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

1988/westley/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/westley/westley.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1988/westley/Makefile">Makefile</a>
   <a class="Right" href="#inventory">Inventory</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1988%2Fwestley%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.last.html -->