*: gofumpt

This is a result of running "gofumpt -w *.go" on the source code.

gofumpt[1] is a tool similar to (and based on) gofmt, which adds some
some extra rules for better code formatting. Here, it removes some extra
vertical whitespace, and replaces a var() block with a single element
inside with a mere var declaration. Both make sense.

Enable gofumpt in golangci-lint config to make sure future commits are
gofumpt-ed.

[1] https://github.com/mvdan/gofumpt

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.golangci.yml

@@ -0,0 +1,4 @@
+# For documentation, see https://golangci-lint.run/usage/configuration/
+linters:
+  enable:
+    - gofumpt

seccomp.go

@@ -56,7 +56,6 @@ func (e VersionError) Error() string {
 	}
 	return fmt.Sprintf("%s requires libseccomp >= %s (current version: %d.%d.%d)",
 		e.op, e.minVer, verMajor, verMinor, verMicro)
-
 }
 
 // ScmpArch represents a CPU architecture. Seccomp can restrict syscalls on a
@@ -252,11 +251,9 @@ const (
 	CompareMaskedEqual ScmpCompareOp = iota
 )
 
-var (
-	// ErrSyscallDoesNotExist represents an error condition where
-	// libseccomp is unable to resolve the syscall
-	ErrSyscallDoesNotExist = fmt.Errorf("could not resolve syscall name")
-)
+// ErrSyscallDoesNotExist represents an error condition where
+// libseccomp is unable to resolve the syscall
+var ErrSyscallDoesNotExist = fmt.Errorf("could not resolve syscall name")
 
 const (
 	// Userspace notification response flags

seccomp_test.go

@@ -69,6 +69,7 @@ func APILevelIsSupported() bool {
 func TestGetAPILevel(t *testing.T) {
 	execInSubprocess(t, subprocessGetAPILevel)
 }
+
 func subprocessGetAPILevel(t *testing.T) {
 	api, err := GetAPI()
 	if !APILevelIsSupported() {
@@ -88,6 +89,7 @@ func subprocessGetAPILevel(t *testing.T) {
 func TestSetAPILevel(t *testing.T) {
 	execInSubprocess(t, subprocessSetAPILevel)
 }
+
 func subprocessSetAPILevel(t *testing.T) {
 	const expectedAPI = uint(1)
 
@@ -560,6 +562,7 @@ func TestMergeFilters(t *testing.T) {
 func TestRuleAddAndLoad(t *testing.T) {
 	execInSubprocess(t, subprocessRuleAddAndLoad)
 }
+
 func subprocessRuleAddAndLoad(t *testing.T) {
 	// Test #1: Add a trivial filter
 	filter1, err := NewFilter(ActAllow)
@@ -636,6 +639,7 @@ func subprocessRuleAddAndLoad(t *testing.T) {
 func TestLogAct(t *testing.T) {
 	execInSubprocess(t, subprocessLogAct)
 }
+
 func subprocessLogAct(t *testing.T) {
 	expectedPid := syscall.Getpid()
 
@@ -681,6 +685,7 @@ func subprocessLogAct(t *testing.T) {
 func TestCreateActKillThreadFilter(t *testing.T) {
 	execInSubprocess(t, subprocessCreateActKillThreadFilter)
 }
+
 func subprocessCreateActKillThreadFilter(t *testing.T) {
 	filter, err := NewFilter(ActKillThread)
 	if err != nil {
@@ -695,6 +700,7 @@ func subprocessCreateActKillThreadFilter(t *testing.T) {
 func TestCreateActKillProcessFilter(t *testing.T) {
 	execInSubprocess(t, subprocessCreateActKillProcessFilter)
 }
+
 func subprocessCreateActKillProcessFilter(t *testing.T) {
 	api, err := GetAPI()
 	if err != nil {
@@ -786,6 +792,7 @@ func notifHandler(ch chan error, fd ScmpFd, tests []notifTest) {
 func TestNotif(t *testing.T) {
 	execInSubprocess(t, subprocessNotif)
 }
+
 func subprocessNotif(t *testing.T) {
 	// seccomp notification requires API level >= 6
 	api, err := GetAPI()
@@ -953,6 +960,7 @@ L:
 func TestNotifUnsupported(t *testing.T) {
 	execInSubprocess(t, subprocessNotifUnsupported)
 }
+
 func subprocessNotifUnsupported(t *testing.T) {
 	// seccomp notification requires API level >= 6
 	api := 0