Fix RST formatting errors

Clean up some shocco RST errors

Change-Id: I9afa0f155f2bfcc73638ae11447c693579288355
diff --git a/exercises/client-args.sh b/exercises/client-args.sh
index 39241a2..9cbb6a6 100755
--- a/exercises/client-args.sh
+++ b/exercises/client-args.sh
@@ -25,7 +25,7 @@
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 
-# Unset all of the known NOVA_ vars
+# Unset all of the known NOVA_* vars
 unset NOVA_API_KEY
 unset NOVA_ENDPOINT_NAME
 unset NOVA_PASSWORD