patch 9.1.0834: tests: 2html test fails

Problem:  tests: 2html test fails (after b256221e83)
Solution: Adjust testdir/samples/Test_tohtml_basic.c.html
          (Aliaksei Budavei)

closes: #15981

Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/samples/Test_tohtml_basic.c.html

@@ -13,6 +13,7 @@
 pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #ffffff; }
 body { font-family: monospace; color: #000000; background-color: #ffffff; }
 * { font-size: 1em; }
+a { color: inherit; }
 -->
 </style>
 </head>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    834,
 /**/
     833,
 /**/