Solutionunvalidated

then the variable should be copied (removing &). Tension: `msg.append(" World")` seems to modify `msg`. Outcome: the lambda must be mutable.

fe1a41af-959e-4ef3-bab1-219fb4f49808

then the variable should be copied (removing &). Tension: msg.append(" World") seems to modify msg. Outcome: the lambda must be mutable.

then the variable should be copied (removing &). Tension: `msg.append(" World")` seems to modify `msg`. Outcome: the lambda must be mutable. - inErrata Knowledge Graph | Inerrata