fix: 码格式新增接口修改

abi-cloud-qr-platform-server/src/main/java/com/abi/qms/platform/service/impl/QrVariableServiceImpl.java

@@ -81,6 +81,7 @@ public class QrVariableServiceImpl implements QrVariableService {
         StringBuffer codeSb = new StringBuffer();
         for (QrVariable qrVariable : qrVariableList) {
             String tempCode = BuildCodeUtil.buildSingleCode(qrVariable.getBuildCodeClass(), null);
+            codeSb.append(tempCode).append(" ");
         }
         String code = codeSb.toString();
         PreviewQrVariableRes res = new PreviewQrVariableRes();