fix style nitpicks (#12995)

* disable restriction (for now)

* reduce duplication

* remove duplication in scim view

* fix diff

* fix reassign

* remove statment that is always wrong

* log with full context

* allign order to anguage defaults

* adress shelldre:S7688

contrib/install.sh

@@ -26,23 +26,23 @@ root_command() {
   }
 
   function get_distribution {
-      if [ -f /etc/os-release ]; then
+      if [[ -f /etc/os-release ]]; then
           . /etc/os-release
           OS=$NAME
           VER=$VERSION_ID
       elif type lsb_release >/dev/null 2>&1; then
           OS=$(lsb_release -si)
           VER=$(lsb_release -sr)
-      elif [ -f /etc/lsb-release ]; then
+      elif [[ -f /etc/lsb-release ]]; then
           . /etc/lsb-release
           OS=$DISTRIB_ID
           VER=$DISTRIB_RELEASE
-      elif [ -f /etc/debian_version ]; then
+      elif [[ -f /etc/debian_version ]]; then
           OS=Debian
           VER=$(cat /etc/debian_version)
-      elif [ -f /etc/SuSe-release ]; then
+      elif [[ -f /etc/SuSe-release ]]; then
           OS=SEL
-      elif [ -f /etc/redhat-release ]; then
+      elif [[ -f /etc/redhat-release ]]; then
           OS=RedHat
       else
           OS=$(uname -s)