Format/typo check 1985/sicherman/README.md

Unless (as seems possible) a format/style change is needed for alt code
sections, this should be the final pass over it.

The thanks-for-fixes.md file was fixed to not refer to the alt code for
the original but rather refer to sicherman.orig.c. The alt file was not
removed, however, because it is not yet clear how to deal with the
situation where alt code is the same as the original code and in
particular wrt Makefile rules. This is another reason that the README.md
file might need to be revisited again.

1985/sicherman/README.md

@@ -1,6 +1,6 @@
 # Worst abuse of the C preprocessor
 
-Col. G. L. Sicherman  
+Col. G. L. Sicherman
 
 ## To build:
 
@@ -32,7 +32,7 @@ Use `sicherman.alt` as you would `sicherman`.
 
 This program abuses the C preprocessor so much that some `cpp`s fail to strip
 out all of the comments on the first pass!  If you were able to understand
-[Decot's](/winners.html#Dave_Decot) [entry in 1984](/1984/decot/decot.c), you
+[Decot's](/winners.html#Dave_Decot) [entry in 1984](/1984/decot/README.md), you
 will have a head start on this one.
 
 Be sure to run this program through lint!  If your lint works
@@ -44,7 +44,9 @@ on a line.  Now enter the letters 'n' through 'z'.  But to borrow a quote
 from Richard Stallman: If you think you understand what this code
 does, then you don't, so read it again!  Explain why:
 
-	./sicherman < sicherman.c | ./sicherman | diff - ./sicherman.c
+```sh
+./sicherman < sicherman.c | ./sicherman | diff - ./sicherman.c
+```
 
 results in diff reporting a difference on some machines.