add lisp packages

lisp/yasnippet-snippets/snippets/sh-mode/safe-bang

@@ -0,0 +1,9 @@
+# -*- mode: snippet -*-
+# name: safer bash settings for scripts
+# key: s!
+# --
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+
+$0