[doc] add a tip about how to brand and stash a searx instance setup

BTW: drop a trailing whitespace

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

docs/admin/installation.rst

@@ -71,3 +71,11 @@ If all services are running fine, you can add it to your HTTP server:
 - :ref:`installation apache`
 - :ref:`installation nginx`
 
+.. _git stash: https://git-scm.com/docs/git-stash
+
+.. tip::
+
+   About script's installation options have a look at chapter :ref:`toolboxing
+   setup`.  How to brand your instance see chapter :ref:`makefile setup`.  To
+   *stash* your instance's setup, `git stash`_ your clone's :origin:`Makefile`
+   and :origin:`.config.sh` file .

docs/utils/index.rst

@@ -41,7 +41,7 @@ Scripts to maintain services often dispose of common commands and environments.
   <lxc-searx.env>` use ::
 
     sudo -H ./utils/lxc.sh cmd -- FORCE_TIMEOUT=0 ./utils/filtron.sh apache install
- 
+
 .. _toolboxing setup:
 
 Tooling box setup