fix: make MySQL writer execute generated DDL

pkg/writers/mysql/writer_test.go

@@ -9,6 +9,13 @@ import (
 	"git.warky.dev/wdevs/relspecgo/pkg/writers"
 )
 
+func TestStripComments(t *testing.T) {
+	got := stripComments("-- header\nCREATE TABLE `users` (\n  `id` INT\n);")
+	if strings.HasPrefix(got, "--") || !strings.HasPrefix(got, "CREATE TABLE") {
+		t.Fatalf("stripComments() = %q", got)
+	}
+}
+
 func TestWriterGeneratesMySQLDDL(t *testing.T) {
 	db := models.InitDatabase("app")
 	s := models.InitSchema("app")