Make shellcheck more happy

root.sh

@@ -200,7 +200,7 @@ function setup_apt()
 	APT::Install-Recommends "0";
 	APT::Install-Suggests "0";
 EOF
-    chroot ${basedir} apt-get install -y gnupg
+    chroot "${basedir}" apt-get install -y gnupg
 
     if [ "${ci_pkgs}" -gt 0 ]; then
       cat << EOF > "${basedir}/etc/apt/sources.list.d/ci.list"
@@ -244,9 +244,9 @@ function create_report()
 {
 	echo "Installed packages:"
 	chroot "${basedir}" dpkg -l
-	echo -e "\nInstalled apt keys:"
+	echo -e "\\nInstalled apt keys:"
 	chroot "${basedir}" apt-key list
-	echo -e "\nKernels:"
+	echo -e "\\nKernels:"
 	ls -l "${basedir}/boot"
 }