Change formatting

README.md

@@ -25,7 +25,7 @@ type, and the mean and median number of rounds it took to win a game.
 
 ## Game Options
 
-    -v, --verbose       Print detailed information about each game.
+    -v, \--verbose       Print detailed information about each game.
                         This gets very long; probably don't use it if
                         you're asking for a large number of games!