Code and documentation cleanup.

scripts/mute-unmute.sh

@@ -11,7 +11,7 @@
 # You should have received a copy of the GNU General Public License along with I38. If not, see <https://www.gnu.org/licenses/>.
                                                                                                                                                                           
  
-if [ $(pamixer --get-mute) = false ]; then
+if [ "$(pamixer --get-mute)" = false ]; then
     spd-say -P important -Cw 'Muting!'
     pamixer -t
 else