Typo fixes in 1986/wall/README.md

1986/wall/README.md

@@ -12,6 +12,8 @@ US of A
 
 NOTE: This entry uses non-standard args to main() that do not work with modern compilers.
 
+NOTE: This entry requires a non-standard K&R C compiler to compile.
+
 ## Judges' comments:
 
 The original version did not have a ';' character in the first line.
@@ -21,10 +23,9 @@ syntax error.
 This program is a masterpiece of obfuscation and humor.  Larry Wall
 (the hacker who gave us rn and patch) asks you to compile and consider
 the warning message generated by the C compiler.  Then execute the
-program and type charters into its standard input.  You will see why
+program and type characters into its standard input.  You will see why
 the compiler documents the program.
 
-NOTE: This entry requires a non-standard K&R C compiler to compile.
 
 Copyright (c) 1986, Landon Curt Noll & Larry Bassel.
 All Rights Reserved.  Permission for personal, educational or non-profit use is