Format fix 1980s and 1990s README.md files

I also updated the todo.md file as I left some things out that have to
be done. I only explicitly named one thing but when I go over them as a
final pass I will address the things in question (some will require
discussion).

1986/README.md

@@ -1,15 +1,13 @@
 # The 1986 contest was named "The Third International Obfuscated C Code Contest"
 
-
-Look at the `README.md` file for the given winner for information
-on how to compile the entry and how to run the winning program.
-Look at the winning source and try to figure how it does what it does!
-You may then wish to look at the Author's remarks for even more details.
+Look at the `README.md` file for the given winning entry for information on how
+to compile it and how to run the winning program.  Look at the winning source
+and try to figure how it does what it does!  You may then wish to look at the
+Author's remarks for even more details.
 
 The [rules for 1986](rules.txt) suggested categories due to the success of the
-[1985](/years.html#1985)
-judging method.  The maximum size was increased from 512 to 1024 bytes.
-Larry Bassel joined as the second official judge.
+[1985](/years.html#1985) judging method.  The maximum size was increased from
+512 to 1024 bytes.  Larry Bassel joined as the second official judge.
 
 A poll was taken for the worst code for
 [BSD](https://en.wikipedia.org/wiki/Berkeley_Software_Distribution) and [System
@@ -24,7 +22,7 @@ program took third place.
 [Micro/Systems
 Journal](https://www.vintage-computer.com/publications.php?microsystemsjournal)
 started regular publishing of the winners.  The practice of making first
-announcement of the winners at the Summer Usenix BOF (Birds of a Feather)
+announcement of the winners at the Summer USENIX BOF (Birds of a Feather)
 started this year.  A notice was posted to net.announce.
 
 =-=