Bump mvdan.cc/gofumpt from 0.11.0 to 0.12.0 in /.tools

[dependabot]

Bumps mvdan.cc/gofumpt from 0.11.0 to 0.12.0.

Release notes

Sourced from mvdan.cc/gofumpt's releases.

v0.12.0

This release is based on Go 1.27's gofmt, and requires Go 1.26 or later.

A standard library import carrying a doc or inline comment is no longer moved into the top import group, as the comment stayed behind and ended up detached at the bottom of the group. See #289.

Moving a standard library import up no longer leaves an empty line where it used to be, which split the remaining imports into extra groups. See #225.

A copyright header or package doc no longer makes gofumpt treat a single-line first declaration as multi-line, adding an empty line after it.

An assignment whose right-hand side is separated by a comment is now left alone, as merging the lines produced output which gofmt would change back.

Consider becoming a sponsor if you benefit from the work that went into this release!

Binaries built on go version go1.27.1 linux/amd64 with:

CGO_ENABLED=0 go build -trimpath -ldflags="-w -s"

Changelog

Sourced from mvdan.cc/gofumpt's changelog.

[v0.12.0] - 2026-09-07

This release is based on Go 1.27's gofmt, and requires Go 1.26 or later.

A standard library import carrying a doc or inline comment is no longer moved into the top import group, as the comment stayed behind and ended up detached at the bottom of the group. See #289.

Moving a standard library import up no longer leaves an empty line where it used to be, which split the remaining imports into extra groups. See #225.

A copyright header or package doc no longer makes gofumpt treat a single-line first declaration as multi-line, adding an empty line after it.

An assignment whose right-hand side is separated by a comment is now left alone, as merging the lines produced output which gofmt would change back.

Commits

• 3e07e7e CHANGELOG: add entry for v0.12.0
• e0311de update deps
• 6249406 fix three out-of-date comments
• b7fd50a add AGENTS.md documenting the project for coding agents
• 05e0adf format: don't merge assignment lines across a comment
• 360940c testdata: add regression test for assignment newlines with comments
• 409d850 format: don't let header comments make the first decl multi-line
• 6ea8a37 testdata: add regression test for header comments before the first decl
• b31bdf4 format: don't leave an empty line where a moved std import was
• ce9a249 format: don't move std imports carrying comments
• Additional commits viewable in compare view

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