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
diff --git a/exercises/client-env.sh b/exercises/client-env.sh
index d242ee5..94f4a82 100755
--- a/exercises/client-env.sh
+++ b/exercises/client-env.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
diff --git a/exercises/sec_groups.sh b/exercises/sec_groups.sh
index 49cb58f..f6810e3 100755
--- a/exercises/sec_groups.sh
+++ b/exercises/sec_groups.sh
@@ -35,7 +35,7 @@
 
 
 # Testing Security Groups
-# =============
+# =======================
 
 # List security groups
 nova secgroup-list