Update the shell auto-insert

emacs.org

@@ -1532,9 +1532,9 @@ Create *auto-insert-alist* so all the mode lists are the same
           "# File: " (file-name-nondirectory buffer-file-name) "\n"
           "# Copyright: " (substring (current-time-string) -4) " " auto-insert-copyright "\n"
           "# Description: " _ "\n"
-          "export script=$(basename \"$0\")\n"
-          "export dir=$(cd \"$(dirname \"$0\")\"; pwd)\n"
-          "export iam=${dir}/${script}\n"
+          "_base=$(basename \"$0\")\n"
+          "_dir=$(cd -P -- \"$(dirname -- \"$(command -v -- \"$0\")\")\" && pwd -P || exit 126)\n"
+          "export _base _dir\n"
           )
          )
        auto-insert-alist)