Avoid unnecessary double wrapping of SELECT statement when used as single function parameter.

tests/postgres/main_test.go

@@ -4,10 +4,9 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"github.com/go-jet/jet/v2/tests/internal/utils/repo"
 	"math/rand"
 	"os"
-	"os/exec"
-	"strings"
 	"testing"
 	"time"
 
@@ -53,13 +52,7 @@ func TestMain(m *testing.M) {
 }
 
 func setTestRoot() {
-	cmd := exec.Command("git", "rev-parse", "--show-toplevel")
-	byteArr, err := cmd.Output()
-	if err != nil {
-		panic(err)
-	}
-
-	testRoot = strings.TrimSpace(string(byteArr)) + "/tests/"
+	testRoot = repo.GetTestsDirPath()
 }
 
 var loggedSQL string