update year level README files

Move copyright notice to the end.

Add a standard comment about the newly added `README.md` files.

Clean up trailing whitespace.

Fixed a few minor typos.

1989/README

@@ -1,16 +1,14 @@
 1989 marked the "The Sixth International Obfuscated C Code Contest"
 
-Copyright (c) 1989, Landon Curt Noll & Larry Bassel.
-All Rights Reserved.  Permission for personal, educational or non-profit use is
-granted provided this this copyright and notice are included in its entirety
-and remains unaltered.  All other uses must receive prior permission in writing
-from both Landon Curt Noll and Larry Bassel.
+
+Look at the README.md file for the given winner for information
+on how to compile the winner 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 comments for even more details.
 
 Instructions for use: Run make to compile entries (it is possible
 that on System V or non-unix systems the makefile needs to be
-changed). Look at the source and try to figure out what the programs
-do, and run them with various inputs. If you want to, look at the
-hints files for (minor) spoilers.
+changed).
 
 This year, the Grand Prize was given to the most useful program.
 
@@ -18,8 +16,7 @@ The "Strangest abuse of the rules" award was given this year to stress
 the fact that starting in 1990, compiling entries must result an
 executable regular file.
 
-In two other cases, we included System V portable versions of winning
-programs.  The makefile always uses the portable version of the "Best
+The makefile always uses the portable version of the "Best
 self modifying program" because there as no loss of functionality in
 using it.  In the case of the "Best game" winner, however, some
 functionality is lost in the portable version and so the makefile uses
@@ -30,3 +27,11 @@ Rules and results were posted to comp.lang.c, comp.sources.unix, and
 alt.sources.  They have been made available on a wide number of Usenet
 archive sites such as uunet.  The 1989 winners will be published in the
 Micro/Systems Journal.
+
+=-=
+
+Copyright (c) 1989, Landon Curt Noll & Larry Bassel.
+All Rights Reserved.  Permission for personal, educational or non-profit use is
+granted provided this this copyright and notice are included in its entirety
+and remains unaltered.  All other uses must receive prior permission in writing
+from both Landon Curt Noll and Larry Bassel.