Fix condition in h2t-ppa

data/modules/apt/h2t-ppa.sh

@@ -4,11 +4,13 @@ directory="/etc/apt/sources.list.d"
 file="$directory/h2t.list"
 alt="$directory/h2t_repo.list"
 
-if ! [ -e "$file" ] || [ -e "$alt" ]; then
+if [[ ! -e "$file" ]] && [[ ! -e "$alt" ]]; then
   wget -O /tmp/h2t-key.pub https://packages.humanoids.kit.edu/h2t-key.pub
   sudo apt-key add /tmp/h2t-key.pub
   rm /tmp/h2t-key.pub
 
   echo -e "deb http://packages.humanoids.kit.edu/bionic/main bionic main\ndeb http://packages.humanoids.kit.edu/bionic/testing bionic testing" | sudo tee "$file" >/dev/null
   sudo apt update
+# else
+  # echo "h2t-ppa already added."
 fi