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.

2018/yang/README.md

@@ -1,7 +1,7 @@
 # Most shifty
 
-    Don Yang\
-    <http://uguu.org/>
+Don Yang\
+<http://uguu.org/>
 
 
 ## To build: