v1.3.55

• Fix a race where a backgrounded plain command (e.g. sleep 3 &) could be missing from jobs -l if checked immediately on the next line, since job registration happened asynchronously with no synchronization at all.
• A second separator immediately after the first (e.g. cmd &;, cmd ;; outside a case body) is now a syntax error, matching bash, instead of silently truncating the input and dropping everything after the stray separator with no error.