Improving mark's functionality in custom entities

Version 1.13.0 December 09, 2022

✨ Features

• Mark allows marking w.r.t. the last element of the pattern. For example if a pattern matches a fluffy cat then mark: [-2, -1] will extract fluffy cat — especially useful when the match length is unknown. 💃
• Improved error handling while processing mark's arguments. 🙌