Fix more space-in-path-proof issues

Signed-off-by: 林博仁 <Buo.Ren.Lin@gmail.com>

template/bash_profile.template.bash

@@ -49,4 +49,4 @@ export SCM_CHECK=true
 # export BASH_IT_AUTOMATIC_RELOAD_AFTER_CONFIG_CHANGE=1
 
 # Load Bash It
-source $BASH_IT/bash_it.sh
+source "$BASH_IT"/bash_it.sh

themes/base.theme.bash

@@ -474,7 +474,7 @@ function battery_char {
     fi
 }
 
-if [ ! -e $BASH_IT/plugins/enabled/battery.plugin.bash ]; then
+if [ ! -e "$BASH_IT"/plugins/enabled/battery.plugin.bash ]; then
     # if user has installed battery plugin, skip this...
     function battery_charge (){
 	# no op