Minor refactor of install_ppa()

Author: flexiondotorg

deb-get

@@ -213,12 +213,11 @@ function install_apt() {
 }
 
 function install_ppa() {
-    local AAR_PARAMS
-    AAR_PARAMS="-y"
-    if [ $(dpkg -S $(command -v apt-add-repository)|cut -d: -f1) == "software-properties-common" ] ; then
-        AAR_PARAMS+=" --no-update";
+    local AAR_PARAMS="-y"
+    if [ "$(dpkg -S "$(command -v apt-add-repository)" | cut -d':' -f1)" == "software-properties-common" ]; then
+        AAR_PARAMS+=" --no-update"
     fi
-    if ${ELEVATE} apt-add-repository $AAR_PARAMS "${PPA}"; then
+    if ${ELEVATE} apt-add-repository ${AAR_PARAMS} "${PPA}"; then
         update_apt
         if ! package_is_installed "${APP}"; then
             eula