Clean up shell code

download.sh

@@ -1,14 +1,15 @@
 #!/usr/bin/env bash
 
 BASE_FOLDER=$(dirname "$(readlink -f "$0")")"/";
+# shellcheck source=init.sh
 . "${BASE_FOLDER}init.sh";
 
-cd "${download_folder}";
+cd "${download_folder}" || exit;
 curl -s https://api.github.com/repos/go-gitea/gitea/releases/latest |\
 	grep browser_download_url |\
 	cut -d '"' -f 4 |\
 	grep "${arch}$" |\
 	wget -P "${download_folder}" -i -
-cd -;
+cd - || exit;
 
 # __END__