On Thursday, 16 January 2020 at 17:11:11 UTC, Adam D. Ruppe wrote: [...]
The string thing probably shouldn't be used anymore. I suggest you always use the => form instead.The string thing is a legacy version that was before the language had =>.
[...] Thanks for that very clear explanation. I have attempted to fix that part of the tour: https://github.com/dlang-tour/english/pull/304