Format fix 1998/dloweneil/README.md

An annoying problem with markdown is that in single backtick code blocks
if the line is wrapped and the line begins with '-' (even in a code
block) the line becomes a list item and breaks the code.

1998/dloweneil/README.md

@@ -145,8 +145,8 @@ than one way simultaneously.
 - Several different coordinate systems are used.  There's the "real" X by Y
 system used for curses, the "inside the box" X by Y system used for moving
 things around and finding instances of `POOT` inside the box, and the position
-of the current letter, which is a single value from 0 to `2 * xsize + 2 * ysize
-- 1`.
+of the current letter, which is a single value from `0` to
+`2 * xsize + 2 * ysize - 1`.
 
 - The fact that `x%3` is a perfect hash function for `x` values `P`, `O` and `T`
 is used.