fix format price bug

lib/internal/Magento/Framework/Locale/Format.php

@@ -171,8 +171,10 @@ class Format implements \Magento\Framework\Locale\FormatInterface
             'pattern' => $currency->getOutputFormat(),
             'pattern' => $currency->getOutputFormat(),
             'precision' => $totalPrecision,
             'precision' => $totalPrecision,
             'requiredPrecision' => $requiredPrecision,
             'requiredPrecision' => $requiredPrecision,
-            'decimalSymbol' => $decimalSymbol,
-            'groupSymbol' => $groupSymbol,
+           /* 'decimalSymbol' => $decimalSymbol,   框架旧代码,这里有bug
+            'groupSymbol' => $groupSymbol,*/
+            'decimalSymbol' => '.',
+            'groupSymbol' => ',',
             'groupLength' => $group,
             'groupLength' => $group,
             'integerRequired' => $totalPrecision == 0,
             'integerRequired' => $totalPrecision == 0,
         ];
         ];