From d52fdde2f8462ebca8f79610f7ee4fb2ae12342d Mon Sep 17 00:00:00 2001
From: Jacob Salmela <jacobsalmela@users.noreply.github.com>
Date: Sat, 3 Oct 2015 11:06:50 -0500
Subject: [PATCH] using double bracket notation

Despite the script running successfully, it produced this error:

`/usr/local/bin/gravity.sh: line 8: [: missing `]'`

prior to this fix.
---
 gravity.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gravity.sh b/gravity.sh
index ba1ac671..d548d13e 100755
--- a/gravity.sh
+++ b/gravity.sh
@@ -5,7 +5,7 @@
 # This script should only be run after you have a static IP address set on the Pi
 piholeIP="$1"
 
-if [ -n "$piholeIP"]; then
+if [[ -n "$piholeIP" ]]; then
         piholeIP=$(hostname -I|xargs)        
 fi