Fixes in several README.md files

There are many more fixes to be made but I wanted these in. Even the
files I have checked will have to be checked again in more detail but I
needed these committed so I could fix something in another file that
will need a new branch. More updates to README.md files will then be put
into yet another branch if the pull requests have not yet been merged
before I get to these updates (which really ought to be a lot of
fun!  :-) )

1992/ant/README.md

@@ -11,8 +11,9 @@ Best Utility:
 Judges' comments:
 
    To use:
+
 	make am
-	am ant.test.mk
+	./am ant.test.mk
     
     Like much of Posix, obfuscation has its place.  Your task is to
     figure out where.
@@ -23,8 +24,8 @@ Judges' comments:
 
     We also suggest that you try:
 	make am
-	am Makefile am_clobber		<-- clobber everything except am
-	am Makefile all
+	./am Makefile am_clobber		<-- clobber everything except am
+	./am Makefile all
 
 
 Selected notes from the author: