Shell: Rename hlt-viewer to highlight-gallery and fix global variable

.shell.d/funs_rc

@@ -93,11 +93,10 @@ termsupport () {
 }
 
 if command -v highlight >/dev/null 2>&1; then
-	hlt-viewer () {
+	highlight-gallery () {
 		local SAMPLE DUMMY
 
-		local usage ()
-		{
+		if [ $# -gt 0 ]; then
 			cat<<EOF
 Usage: $1
 
@@ -107,10 +106,6 @@ highlight is a tool for listing printing. This script displays a preview for
 every highlight's theme.  Press ENTER to display next preview. Press anything
 else then ENTER to quit.
 EOF
-		}
-
-		if [ $# -gt 0 ]; then
-			usage "$0"
 			return
 		fi
 
@@ -129,7 +124,7 @@ EOF
 )"
 
 		for i in $(highlight -w | grep -v "\s\|^$"); do
-			echo "******************** $i ********************"
+			echo "==> $i"
 			highlight -S c -O xterm256 <(echo "$SAMPLE") -s "$i"
 			read DUMMY
 			if [ -n "$DUMMY" ]; then