Format fixes in 2000/anderson/README.md

I observed something strange though: the author noted the output of the
input 'Hello, world!' and it doesn't appear to match the program before
or after the fgets() change. I'm not sure if this is a bug or if it is
(as I guess) a formatting problem.

2000/anderson/README.md

@@ -36,7 +36,7 @@ organizer; just in case you are stranded on a desert island and need to
 signal your distress to passing ships.
 
 The obfuscation in this program is truly masterful.  The program is
-very cleverly obscured without the use of a single #define!
+very cleverly obscured without the use of a single `#define`!
 Reformatting this program by hand :-) is the easiest way to understand
 what is going on.
 
@@ -52,6 +52,7 @@ output as a depiction of a person holding two flags, using only ASCII
 characters (semaphore smileys, if you will).  For example, given the
 input "Hello, world!", the output will be:
 
+```
 	      <>       <>       <>    <>                  <>     <>
   _()       ()/      ()/      ()/     _\)       ()       (/_     _\)
 [] /^      |^^      /^^      /^^    [] ^^      |^^|      ^^ [] [] ^^
@@ -63,6 +64,7 @@ input "Hello, world!", the output will be:
 [] ^^ []   /^^       ^^|     |^^|
    ][     <>][       ][]     [][]
 
+```
 
 The program is obfuscated without the use of the preprocessor or any
 special compilation parameters.  In fact, the program doesn't even
@@ -74,7 +76,7 @@ statements to format the code properly.)  There is a single string
 constant which encodes the flag positions and other data needed for
 drawing the semaphore codes.
 
-The preprocessor will provide no help in un-obfuscating this code, and a
+The preprocessor will provide no help in de-obfuscating this code, and a
 C beautifier won't get you very far either.  You just have to crunch
 through it.