let left = call_tactic ProofEngine.left;;
let right = call_tactic ProofEngine.right;;
let assumption = call_tactic ProofEngine.assumption;;
-let generalize = call_tactic_with_goal_inputs ProofEngine.generalize;;
+let generalize =
+ call_tactic_with_goal_inputs (ProofEngine.generalize ~mk_fresh_name_callback);;
let absurd = call_tactic_with_input ProofEngine.absurd;;
let contradiction = call_tactic ProofEngine.contradiction;;
let decompose =