x/tools/cmd/goimports: adds flag control to delete extra blank lines before grouping

[QianChenglong]

What version of Go are you using (go version)?

$ go version
go version go1.15.2 darwin/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/chenglong/Library/Caches/go-build"
GOENV="/Users/chenglong/Library/Application Support/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/chenglong/go/pkg/mod"
GONOPROXY="tkestack.io,k8s.io,git.code.oa.com"
GONOSUMDB="tkestack.io,k8s.io,git.code.oa.com"
GOOS="darwin"
GOPATH="/Users/chenglong/go"
GOPRIVATE="tkestack.io,k8s.io,git.code.oa.com"
GOPROXY="https://goproxy.cn,direct"
GOROOT="/usr/local/Cellar/go/1.15.2/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.15.2/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/20/n4jpmhjs0hd9hjxg80yr2nww0000gn/T/go-build993050189=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

use goimports to format file.

current:

What did you expect to see?

Blank lines cause incorrect grouping. These blank lines are automatically generated by IDE.

What did you see instead?

Delete extra blank lines and regroup:

[andyxning]

Any clue for this issue?

[ImprintNav]

Two and a half years later and still not even looked into.