document another cleanup method

diff --git a/README b/README
index 83214bf6653555c7692642aa66866873418f35df..78873d6d4f7f40b70f463512aff4fb6ec215f5f5 100644 (file)
--- a/README
+++ b/README
@@ -11,6 +11,9 @@ For scripts without any nested function calls, this is usually sufficient:
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
+Cleanup commands or functions can be appended to the ERR trap after a
+semicolon within the single quotes.
+
 Related: see my bash script template repo, at https://iankelling.org/git.
 
 Please email me if you have a patches, bugs, feedback, or republish this