style: gofumpt all the things (#9829)

Literally `gofumpt -w .` from the top level dir. Guaranteed to be minor
style changes only and nothing else.

@imsodin per request?

lib/db/backend/debug.go

@@ -10,6 +10,4 @@ import (
 	"github.com/syncthing/syncthing/lib/logger"
 )
 
-var (
-	l = logger.DefaultLogger.NewFacility("backend", "The database backend")
-)
+var l = logger.DefaultLogger.NewFacility("backend", "The database backend")

lib/db/blockmap_test.go

@@ -13,8 +13,10 @@ import (
 	"github.com/syncthing/syncthing/lib/protocol"
 )
 
-var f1, f2, f3 protocol.FileInfo
-var folders = []string{"folder1", "folder2"}
+var (
+	f1, f2, f3 protocol.FileInfo
+	folders    = []string{"folder1", "folder2"}
+)
 
 func init() {
 	blocks := genBlocks(30)

lib/db/db_test.go

@@ -159,7 +159,6 @@ func init() {
 
 func TestUpdate0to3(t *testing.T) {
 	ldb, err := openJSONS("testdata/v0.14.45-update0to3.db.jsons")
-
 	if err != nil {
 		t.Fatal(err)
 	}

lib/db/debug.go

@@ -10,9 +10,7 @@ import (
 	"github.com/syncthing/syncthing/lib/logger"
 )
 
-var (
-	l = logger.DefaultLogger.NewFacility("db", "The database layer")
-)
+var l = logger.DefaultLogger.NewFacility("db", "The database layer")
 
 func shouldDebug() bool {
 	return l.ShouldDebug("db")

lib/db/set_test.go

@@ -55,6 +55,7 @@ func globalList(t testing.TB, s *db.FileSet) []protocol.FileInfo {
 	})
 	return fs
 }
+
 func globalListPrefixed(t testing.TB, s *db.FileSet, prefix string) []db.FileInfoTruncated {
 	var fs []db.FileInfoTruncated
 	snap := snapshot(t, s)