Fixed README

README.md

@@ -17,6 +17,7 @@ The lyrics are extracted from the html document using regex.
 
 ## Usage
 Command line options:
+```man
 -d [directory] process directory [directory]
 -f [file] process file [file]
 -r go through directories recursively
@@ -25,6 +26,7 @@ Command line options:
 -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