minor: doc improvement

diff --git a/err b/err
index 988678a9730a16bb414826bc37307cb512e63fbe..ff7d0f8d8b8c9c44e0a314f3e1faa9f2ffdd892c 100644 (file)
--- a/err
+++ b/err
@@ -66,6 +66,8 @@ if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
 #                    scripts on debian based systems.
 #
 #  err-cleanup       If set, this command will run just before exiting.
+#                    This does nothing in an interactive shell, I'm not
+#                    sure if I could make it work there.
 #
 #  _err_func_last    Used internally in err-bash-trace-interactive
 #