cleanup winner README.md files

Fixed cases where there was a bad trailing backslash.

Improved a few cases where a code block was needed
to highlight some text.

Changed a few cases where a code block needed to
declared as, say, a sh code block.

Fixed a few cases where the winner information was not properly formatted.

Plus a few nits and clarifying text was added.

2000/jarijyrki/README.md

@@ -4,8 +4,8 @@ Jari Arkko\
 Kauppalantie 25A7\
 02700 Kauniainen\
 Finland\
-<http://www.arkko.com>\
-\
+<http://www.arkko.com>
+
 Jyrki Holopainen\
 Forsellesintie 1-3A10\
 02700 Kauniainen\