replace shebang with vim modeline, improve syntax

bashcols

@@ -1,4 +1,4 @@
-#!/bin/bash
+# vim: syntax=bash:
 
 eval "reset_esc=\"\\e[0m\""
 
@@ -9,9 +9,9 @@ function colout() {
 		return
 	fi
 
-	local color=$1
+	local color="$1"
 	shift
-	tput setaf $color
+	tput setaf "$color"
 	"$@"
 	tput sgr0
 }
@@ -37,7 +37,7 @@ function defcol() {
 function dispcollist() {
 	local width=${1:-16}
 	local idx=0
-	for colid in `seq 1 256`; do
+	for colid in {1..256}; do
 		colout $colid printf "%3s " $colid
 		idx=$(($idx+1))	
 		if [[ $(($idx % $width)) -eq 0 ]]; then