Format, typo, consistency check YYYY/README.md

There are many fixes made but a few questions remain so when I reach
those years I will address those then. Unfortunately, due to
infrastructure work right now, this is all I can say even though there
are a number of things I'd like to say.

ioccc.css

@@ -756,7 +756,7 @@ blockquote {
  * headings (h1, h2, ...) is too similar so we use dark green with italics
  * as the choice.
  */
-.content blockquote p {
+.content blockquote p, blockquote ol li {
     color: darkgreen;
     font-style: italic;
 }