gofumpt 0.6.0

[BrewTestBot]

Created by brew bump

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Created with brew bump-formula-pr.

release notes

This release is based on Go 1.21's gofmt, and requires Go 1.20 or later.
The following changes are included:

Support go version strings from newer go.mod files - #280
Consider simple error checks even if they use the = operator - #271
Ignore //line directives to avoid panics - #288

Binaries built on go version go1.21.6 linux/amd64 with:
CGO_ENABLED=0 go build -trimpath -ldflags="-w -s -X=main.version=v0.6.0"

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[github-actions]

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