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.

2013/birken/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/birken/birken.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/birken/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%2F2013%2Fbirken%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.first.html -->

2013/cable1/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable1/cable1.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable1/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%2F2013%2Fcable1%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/cable2/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable2/cable2.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable2/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%2F2013%2Fcable2%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/cable3/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable3/cable3.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/cable3/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%2F2013%2Fcable3%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/dlowe/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/dlowe/dlowe.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/dlowe/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%2F2013%2Fdlowe%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/endoh1/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh1/endoh1.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh1/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%2F2013%2Fendoh1%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/endoh2/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh2/endoh2.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh2/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%2F2013%2Fendoh2%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/endoh3/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh3/endoh3.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh3/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%2F2013%2Fendoh3%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/endoh4/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/endoh4.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/endoh4/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%2F2013%2Fendoh4%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/hou/doc/example.html

@@ -122,6 +122,7 @@
 
 <div class="navbar">
   <a class="Left" href="../index.html">&uarr; jump to index.html &uarr;</a>
+  <a class="Right" href="https://validator.w3.org/nu/?doc=#">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.up2index.html -->

2013/hou/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/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%2F2013%2Fhou%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/index.html

@@ -125,6 +125,7 @@
   <a class="Left" href="../years.html">&uarr; top &uarr;</a>
   <a class="Left" href="../2014/index.html">2014 &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%2F2013%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.year.mid.html -->

2013/mills/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/mills/mills.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/mills/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%2F2013%2Fmills%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/misaka/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/misaka/misaka.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/misaka/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%2F2013%2Fmisaka%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/morgan1/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/morgan1/morgan1.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/morgan1/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%2F2013%2Fmorgan1%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/morgan2/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/morgan2/morgan2.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/morgan2/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%2F2013%2Fmorgan2%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.mid.html -->

2013/robison/index.html

@@ -127,6 +127,7 @@
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/robison/robison.c">C code</a>
   <a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/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%2F2013%2Frobison%2Findex.html">&#x2713;</a>
 </div>
 
 <!-- END: this line ends content from: inc/navbar.last.html -->