Issue #3081351 by Odai Atieh: Fix [Vartheme BS3] theme sub-theme bash script generator on MAC OS X

scripts/create-new-vartheme.sh

@@ -48,23 +48,23 @@ current_path=$(pwd);
 drupal_root="$current_path";
 
 if [[ "${drupal_root: -1}" == "/" ]]; then
-  drupal_root="${drupal_root::-1}";
+  drupal_root="${drupal_root:0:${#drupal_root}-1}";
 fi
 
 if [[ "${drupal_root: -24}" == "profiles/varbase/scripts" ]]; then
-  drupal_root="${drupal_root::-24}";
+  drupal_root="${drupal_root:0:${#drupal_root}-24}";
 fi
 
 if [[ "${drupal_root: -16}" == "profiles/varbase" ]]; then
-  drupal_root="${drupal_root::-16}";
+  drupal_root="${drupal_root:0:${#drupal_root}-16}";
 fi
 
 if [[ "${drupal_root: -8}" == "profiles" ]]; then
-  drupal_root="${drupal_root::-8}";
+  drupal_root="${drupal_root:0:${#drupal_root}-8}";
 fi
 
 if [[ "${drupal_root: -1}" == "/" ]]; then
-  drupal_root="${drupal_root::-1}";
+  drupal_root="${drupal_root:0:${#drupal_root}-1}";
 fi
 
 echo "Current path: $current_path";