Rearrange the help text for block & unblock.
diff --git a/rfkill.c b/rfkill.c
index 7b44b5a..3cb2605 100644
--- a/rfkill.c
+++ b/rfkill.c
@@ -224,8 +224,6 @@
 
 static const char *argv0;
 
-#define BLOCK_PARAMS "{<idx>,all,wifi,wlan,bluetooth,uwb,ultrawideband,wimax,wwan,gps}"
-
 static void usage(void)
 {
 	fprintf(stderr, "Usage:\t%s [options] command\n", argv0);
@@ -235,8 +233,10 @@
 	fprintf(stderr, "\thelp\n");
 	fprintf(stderr, "\tevent\n");
 	fprintf(stderr, "\tlist\n");
-	fprintf(stderr, "\tblock "BLOCK_PARAMS"\n");
-	fprintf(stderr, "\tunblock "BLOCK_PARAMS"\n");
+	fprintf(stderr, "\tblock IDENTIFIER\n");
+	fprintf(stderr, "\tunblock IDENTIFIER\n");
+	fprintf(stderr, "where IDENTIFIER is the index no. of an rfkill switch or one of:\n");
+	fprintf(stderr, "\t<idx> all wifi wlan bluetooth uwb ultrawideband wimax wwan gps\n");
 }
 
 static void version(void)