v2.2.11

New Features

• Add free_port: returns an OS-picked free TCP port on a given host (#907)
• Document open_doc section layer in editskill; use pilcrow for newlines in CellRow repr (#906)
• Add MAXLEN constant (180) for cell display truncation, replacing hardcoded 120 defaults (#905)
• Simplify sig_with_params by removing keep param (#904)