self-upgrade exec bash -l

lib/self-upgrade.bash

@@ -51,7 +51,10 @@ function perform_upgrade {
   sudo mv "$MIAOU_BASH_DIR" "$backup"
   if "$backup"/install.sh upgraded; then
     sudo rm -rf "$backup"
-    echo -e "to refresh your shell, you should now perform:\n\texec bash -l"
+    cat <<EOF
+To reset this session, you can run:
+  exec bash -l
+EOF
   else
     echo "ERROR: trouble during self-upgrade: revert back"
     sudo rm -rf "$MIAOU_BASH_DIR"