Proper format fix 1987/korn/README.md

I didn't want to look at it properly (and certainly did not want to read
it) without seeing if I could figure out what it did on visual
inspection (as the judges say very few can) as there are spoilers. I was
able to so I now have no problem going through the file properly.

1987/korn/README.md

@@ -23,26 +23,27 @@ section right now and see if you are one of the few people who can.
 
 Several points are important to understand in this program:
 
-1) What is the symbol 'unix' and what is its value in the program?
+1. What is the symbol `unix` and what is its value in the program?  Clearly
-   Clearly 'unix' is not a function, and since 'unix' is not declared
+`unix` is not a function, and since `unix` is not declared to be a data type
-   to be a data type (such as int, char, struct foo, enum, ...)
+(such as `int`, `char`, `struct foo`, `enum`, ...) what must `unix` be?
-   what must 'unix' be?
 
-2) What is the value of the symbol "have"?  (hint: the value is
+2. What is the value of the symbol `"have"`?  (hint: the value is NOT 4
-   NOT 4 characters, or 'h', or a string)  Consider the fact that:
+characters, or `'h'`, or a string)  Consider the fact that:
 
 
 	    char *x;  
 
 
-  defines a pointer to a character (i.e. an address), and that
+  defines a pointer to a character (i.e. an address), and that the `=` assigns
-  the '=' assigns things is compatible types.  Since:
+  things of compatible types.  Since:
+
 
         x = "have";
 
-  is legal C, what type of value is "have"?
+  is legal C, what type of value is `"have"`?
+
+3. Note that the following expressions yield the same value:
 
-3) Note that the following expressions yield the same value:
 
         x[3]	*(x+3)	  *(3+x)  
 
@@ -50,6 +51,8 @@ Several points are important to understand in this program:
 
         3[x]  
 
+    ?
+
 David Korn's `/bin/ksh` provides us with a greatly improved version of
 the /bin/sh.  The source for v7's /bin/sh greatly inspired this contest.