tour: struct literals in same def/print order

[crisman]

The current code on "tour/moretypes/5" ("Struct Literals") seems to be designed to confuse a reader into thinking that contents of 'v1' and 'p' are importantly the same. The contents of both variable's structs have the same int values and then when printed they are (what seems like purposefully, but with no explanation) printed next to each other.

Set the values in 'p' to be different and print the values in the same order they are defined in.

[gopherbot]

This PR (HEAD: 836bd29d44bdf4e84d43128f0e7d11797f3b4e86) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/website/+/473475 to see it.

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