Add to / fix formatting in 1991/ant/README.md

In the judges' comments add some humour.

Add a try section.

Note that a file is needed for the program to do anything (that is a
file that exists) - not specifying an arg will exit without doing
anything at all.

Explain how to enter form-feed as this is important.

Fix formatting.

1991/ant/README.md

@@ -10,17 +10,35 @@
 
         make all
 
-### To run
+## To run:
+
+	./ant some_file
+
+NOTE: the file must already exist and not specifying any arg will make the
+program exit without doing anything.
+
+## Try:
 
 	cp README.md hill
 	./ant hill
 
-## Judges' comments
+## Judges' comments:
 
 The author was kind enough to supply a list of references below,
 in case you are still confused after read the source!  :-)
 
-## Author's comments
+BTW: you've most likely heard the joke that if you want a pseudo-random string
+of characters you can put a user unfamiliar with vi(m) in a vi(m) session (in
+insert mode) and ask them to exit. Well in this case you're likely to have this
+problem if you ARE a vi(m) user! :-) ... especially if you don't read the
+information below. This means if you're reading this in vi(m) you'll have to
+exit this like in normal vi(m) and then exit `./ant` differently.
+
+NOTE: to enter form feed you should be able to hit `ctrl-L`. This will allow you
+to exit insert mode rather than ESC like in normal vi(m). See the author's
+commands section for other commands.
+
+## Author's comments:
 
 Ant's Editor vIOCCC91
 
@@ -31,7 +49,8 @@
 Non-printable characters may have unpredictable results depending
 on the implementation of CURSES.
 
-    COMMANDS
+### COMMANDS:
+
     h j k l	    left, down, up, right cursor movement
     H J K L	    word left, page down, page up, word right
     [ ]		    beginning and end of line
@@ -42,10 +61,14 @@
     R		    refresh the screen
     Q		    quit
     
-    EXIT STATUS
+### EXIT STATUS:
+
     0		    success
     2		    missing edit filename
 
+
+### ABOUT THIS ENTRY:
+
 The BUF size should be set at compile time to 32767.  This value
 was used because the Sozobon C compiler for the Atari ST has 16 
 bit ints and a limit on the size of arrays & structures of 32k.  
@@ -78,7 +101,8 @@
 scrolling the screen with long lines.  Paging up and down should
 work correctly, however.
 
-    REFERENCES
+### REFERENCES:
+
 [Fin80]	Craig A. Finseth, "Theory and Practice of Text Editors or 
 	A Cookbook For An EMACS", TM-165, MIT Lab. for Computer 
 	Science