go/printer: don't strip parens around *ast.Ellipsis in return field list

[mateusz834]

Before this change:

func A() (...A)

was formatted into:

func A() ...A

which causes a parse error.

With this change it is going to be formatted as (no change):

func A() (...A)

[gopherbot]

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[gopherbot]

Message from Gopher Robot:

Patch Set 1:

(1 comment)

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[gopherbot]

This PR (HEAD: 05e596c) has been imported to Gerrit for code review.

Please visit Gerrit at https://go-review.googlesource.com/c/go/+/626758.

Important tips:

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• To change your code in response to feedback:
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  • Multiple commits in the PR will be squashed by GerritBot.
• The title and description of the GitHub PR are used to construct the final commit message.
  • Edit these as needed via the GitHub web interface (not via Gerrit or git).
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[gopherbot]

Message from Mateusz Poliwczak:

Patch Set 2: Commit-Queue+1

(1 comment)

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[gopherbot]

Message from Go LUCI:

Patch Set 2:

Dry run: CV is trying the patch.

Bot data: {"action":"start","triggered_at":"2024-11-09T11:32:24Z","revision":"6dcb6d25b0e6767315cc50bd6eb0d13ff18b6d84"}

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[gopherbot]

Message from Mateusz Poliwczak:

Patch Set 2: -Commit-Queue

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[gopherbot]

Message from Go LUCI:

Patch Set 2:

This CL has passed the run

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[gopherbot]

Message from Go LUCI:

Patch Set 2: LUCI-TryBot-Result+1

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Message from Matthew Dempsky:

Patch Set 2:

(1 comment)

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[gopherbot]

Message from Mateusz Poliwczak:

Patch Set 2:

(1 comment)

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[gopherbot]

Message from Matthew Dempsky:

Patch Set 2:

(1 comment)

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[gopherbot]

Message from Mateusz Poliwczak:

Patch Set 2:

(1 comment)

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