git_status_shortcuts: don't clobber $IFS

lib/design.sh

@@ -34,7 +34,7 @@ design() {
   local project=`basename $(pwd)`
   local all_project_dirs="$design_base_dirs $design_av_dirs"
   # Ensure design dir contains all subdirectories
-  IFS=$' \t\n'
+  local IFS=$' \t\n'
   # Create root design dirs
   for dir in $design_ext_dirs; do mkdir -p "$root_design_dir/$dir"; done
   # Create project design dirs
@@ -102,6 +102,5 @@ design() {
     printf "Invalid command.\n\n"
     design
   fi
-  unset IFS
 }