Fixed README

README.md

@@ -17,14 +17,16 @@ The lyrics are extracted from the html document using regex.
 
 ## Usage
 Command line options:
-    -d [directory] process directory [directory]
-    -f [file] process file [file]
-    -r go through directories recursively
-    -s silent, no command-line output
-    -i ignore history
-    -n do not write to history
-    -o overwrite if the file already has a comment
-    -h show this
+```man
+-d [directory] process directory [directory]
+-f [file] process file [file]
+-r go through directories recursively
+-s silent, no command-line output
+-i ignore history
+-n do not write to history
+-o overwrite if the file already has a comment
+-h show this
+```
 If you do not specify a directory or file, the program will ask you if you want to use the current working directory.
 
 ## Installation