Fix gb -D expansion

lib/git/branch_shortcuts.sh

@@ -15,7 +15,7 @@ function _scmb_git_branch_shortcuts {
   fail_if_not_git_repo || return 1
   # Fall back to normal git branch, if any unknown args given
   if [[ -n "$@" ]] && [[ "$@" != "-a" ]]; then
-    $_git_cmd branch "$@"
+    exec_scmb_expand_args $_git_cmd branch "$@"
     return 1
   fi