diff --git a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Validate.php b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Validate.php
index 3a81b4633b2ff..40a2ce692e404 100644
--- a/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Validate.php
+++ b/app/code/Magento/Catalog/Controller/Adminhtml/Product/Attribute/Validate.php
@@ -158,7 +158,7 @@ private function isUniqueAdminValues(array $optionsValues, array $deletedOptions
     {
         $adminValues = [];
         foreach ($optionsValues as $optionKey => $values) {
-            if (!(isset($deletedOptions[$optionKey]) and $deletedOptions[$optionKey] === '1')) {
+            if (!(isset($deletedOptions[$optionKey]) && $deletedOptions[$optionKey] === '1')) {
                 $adminValues[] = reset($values);
             }
         }
diff --git a/app/code/Magento/Directory/Model/ResourceModel/Country/Collection.php b/app/code/Magento/Directory/Model/ResourceModel/Country/Collection.php
index da5ad64f8b239..02fed61c44863 100644
--- a/app/code/Magento/Directory/Model/ResourceModel/Country/Collection.php
+++ b/app/code/Magento/Directory/Model/ResourceModel/Country/Collection.php
@@ -328,7 +328,7 @@ private function addDefaultCountryToOptions(array &$options)
 
         foreach ($options as $key => $option) {
             if (isset($defaultCountry[$option['value']])) {
-                $options[$key]['is_default'] = $defaultCountry[$option['value']];
+                $options[$key]['is_default'] = !empty($defaultCountry[$option['value']]);
             }
         }
     }
diff --git a/app/code/Magento/Paypal/Controller/Transparent/RequestSecureToken.php b/app/code/Magento/Paypal/Controller/Transparent/RequestSecureToken.php
index 2efae34a96459..3738a479816b3 100644
--- a/app/code/Magento/Paypal/Controller/Transparent/RequestSecureToken.php
+++ b/app/code/Magento/Paypal/Controller/Transparent/RequestSecureToken.php
@@ -82,7 +82,7 @@ public function execute()
         /** @var Quote $quote */
         $quote = $this->sessionManager->getQuote();
 
-        if (!$quote or !$quote instanceof Quote) {
+        if (!$quote || !$quote instanceof Quote) {
             return $this->getErrorResponse();
         }
 
@@ -106,6 +106,8 @@ public function execute()
     }
 
     /**
+     * Get error response.
+     *
      * @return Json
      */
     private function getErrorResponse()
diff --git a/app/code/Magento/Sales/Model/Order/Email/Sender/OrderSender.php b/app/code/Magento/Sales/Model/Order/Email/Sender/OrderSender.php
index f06da0de0fd00..7ac11ca073d26 100644
--- a/app/code/Magento/Sales/Model/Order/Email/Sender/OrderSender.php
+++ b/app/code/Magento/Sales/Model/Order/Email/Sender/OrderSender.php
@@ -97,7 +97,7 @@ public function __construct(
      */
     public function send(Order $order, $forceSyncMode = false)
     {
-        $order->setSendEmail(true);
+        $order->setSendEmail($this->identityContainer->isEnabled());
 
         if (!$this->globalConfig->getValue('sales_email/general/async_sending') || $forceSyncMode) {
             if ($this->checkAndSend($order)) {
diff --git a/app/code/Magento/Sales/Test/Unit/Model/Order/Email/Sender/OrderSenderTest.php b/app/code/Magento/Sales/Test/Unit/Model/Order/Email/Sender/OrderSenderTest.php
index 46c44c03b1514..88053ea684ce8 100644
--- a/app/code/Magento/Sales/Test/Unit/Model/Order/Email/Sender/OrderSenderTest.php
+++ b/app/code/Magento/Sales/Test/Unit/Model/Order/Email/Sender/OrderSenderTest.php
@@ -64,7 +64,7 @@ public function testSend($configValue, $forceSyncMode, $emailSendingResult, $sen
 
         $this->orderMock->expects($this->once())
             ->method('setSendEmail')
-            ->with(true);
+            ->with($emailSendingResult);
 
         $this->globalConfig->expects($this->once())
             ->method('getValue')
@@ -72,7 +72,7 @@ public function testSend($configValue, $forceSyncMode, $emailSendingResult, $sen
             ->willReturn($configValue);
 
         if (!$configValue || $forceSyncMode) {
-            $this->identityContainerMock->expects($this->once())
+            $this->identityContainerMock->expects($this->exactly(2))
                 ->method('isEnabled')
                 ->willReturn($emailSendingResult);
 
@@ -118,7 +118,7 @@ public function testSend($configValue, $forceSyncMode, $emailSendingResult, $sen
 
                     $this->orderMock->expects($this->once())
                         ->method('setEmailSent')
-                        ->with(true);
+                        ->with($emailSendingResult);
 
                     $this->orderResourceMock->expects($this->once())
                         ->method('saveAttribute')
@@ -210,7 +210,7 @@ public function testSendVirtualOrder($isVirtualOrder, $formatCallCount, $expecte
             ->with('sales_email/general/async_sending')
             ->willReturn(false);
 
-        $this->identityContainerMock->expects($this->once())
+        $this->identityContainerMock->expects($this->exactly(2))
             ->method('isEnabled')
             ->willReturn(true);
 
diff --git a/app/code/Magento/Security/Model/SecurityChecker/Quantity.php b/app/code/Magento/Security/Model/SecurityChecker/Quantity.php
index 7f1d85abeb74b..cbf41980c51d3 100644
--- a/app/code/Magento/Security/Model/SecurityChecker/Quantity.php
+++ b/app/code/Magento/Security/Model/SecurityChecker/Quantity.php
@@ -47,13 +47,13 @@ public function __construct(
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function check($securityEventType, $accountReference = null, $longIp = null)
     {
         $isEnabled = $this->securityConfig->getPasswordResetProtectionType() != ResetMethod::OPTION_NONE;
         $allowedAttemptsNumber = $this->securityConfig->getMaxNumberPasswordResetRequests();
-        if ($isEnabled and $allowedAttemptsNumber) {
+        if ($isEnabled && $allowedAttemptsNumber) {
             $collection = $this->prepareCollection($securityEventType, $accountReference, $longIp);
             if ($collection->count() >= $allowedAttemptsNumber) {
                 throw new SecurityViolationException(
diff --git a/app/code/Magento/SendFriend/Model/SendFriend.php b/app/code/Magento/SendFriend/Model/SendFriend.php
index c69d6342b4892..38525a9f83a12 100644
--- a/app/code/Magento/SendFriend/Model/SendFriend.php
+++ b/app/code/Magento/SendFriend/Model/SendFriend.php
@@ -16,6 +16,7 @@
  * @method \Magento\SendFriend\Model\SendFriend setTime(int $value)
  *
  * @author      Magento Core Team <core@magentocommerce.com>
+ * @SuppressWarnings(PHPMD.CookieAndSessionMisuse)
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  *
  * @api
@@ -162,6 +163,8 @@ protected function _construct()
     }
 
     /**
+     * Send email.
+     *
      * @return $this
      * @throws CoreException
      */
@@ -236,7 +239,7 @@ public function validate()
         }
 
         $email = $this->getSender()->getEmail();
-        if (empty($email) or !\Zend_Validate::is($email, \Magento\Framework\Validator\EmailAddress::class)) {
+        if (empty($email) || !\Zend_Validate::is($email, \Magento\Framework\Validator\EmailAddress::class)) {
             $errors[] = __('Invalid Sender Email');
         }
 
@@ -281,13 +284,13 @@ public function setRecipients($recipients)
         // validate array
         if (!is_array(
             $recipients
-        ) or !isset(
+        ) || !isset(
             $recipients['email']
-        ) or !isset(
+        ) || !isset(
             $recipients['name']
-        ) or !is_array(
+        ) || !is_array(
             $recipients['email']
-        ) or !is_array(
+        ) || !is_array(
             $recipients['name']
         )
         ) {
@@ -487,7 +490,7 @@ protected function _sentCountByCookies($increment = false)
             $oldTimes = explode(',', $oldTimes);
             foreach ($oldTimes as $oldTime) {
                 $periodTime = $time - $this->_sendfriendData->getPeriod();
-                if (is_numeric($oldTime) and $oldTime >= $periodTime) {
+                if (is_numeric($oldTime) && $oldTime >= $periodTime) {
                     $newTimes[] = $oldTime;
                 }
             }
diff --git a/app/code/Magento/Tax/Model/Sales/Total/Quote/Tax.php b/app/code/Magento/Tax/Model/Sales/Total/Quote/Tax.php
index 82e2048283a9b..865b656918cc1 100755
--- a/app/code/Magento/Tax/Model/Sales/Total/Quote/Tax.php
+++ b/app/code/Magento/Tax/Model/Sales/Total/Quote/Tax.php
@@ -264,7 +264,7 @@ protected function processExtraTaxables(Address\Total $total, array $itemsByType
     {
         $extraTaxableDetails = [];
         foreach ($itemsByType as $itemType => $itemTaxDetails) {
-            if ($itemType != self::ITEM_TYPE_PRODUCT and $itemType != self::ITEM_TYPE_SHIPPING) {
+            if ($itemType != self::ITEM_TYPE_PRODUCT && $itemType != self::ITEM_TYPE_SHIPPING) {
                 foreach ($itemTaxDetails as $itemCode => $itemTaxDetail) {
                     /** @var \Magento\Tax\Api\Data\TaxDetailsInterface $taxDetails */
                     $taxDetails = $itemTaxDetail[self::KEY_ITEM];
@@ -407,6 +407,7 @@ protected function enhanceTotalData(
 
     /**
      * Process model configuration array.
+     *
      * This method can be used for changing totals collect sort order
      *
      * @param   array $config
diff --git a/app/code/Magento/Ui/view/base/web/js/form/element/country.js b/app/code/Magento/Ui/view/base/web/js/form/element/country.js
index f64a80bf535ec..c75301018e190 100644
--- a/app/code/Magento/Ui/view/base/web/js/form/element/country.js
+++ b/app/code/Magento/Ui/view/base/web/js/form/element/country.js
@@ -49,7 +49,7 @@ define([
 
             if (!this.value()) {
                 defaultCountry = _.filter(result, function (item) {
-                    return item['is_default'] && item['is_default'].includes(value);
+                    return item['is_default'] && _.contains(item['is_default'], value);
                 });
 
                 if (defaultCountry.length) {
diff --git a/app/design/frontend/Magento/luma/Magento_GroupedProduct/web/css/source/_module.less b/app/design/frontend/Magento/luma/Magento_GroupedProduct/web/css/source/_module.less
index 088372808aa6a..fe49d6679a613 100644
--- a/app/design/frontend/Magento/luma/Magento_GroupedProduct/web/css/source/_module.less
+++ b/app/design/frontend/Magento/luma/Magento_GroupedProduct/web/css/source/_module.less
@@ -133,9 +133,18 @@
 }
 
 .media-width(@extremum, @break) when (@extremum = 'max') and (@break = @screen__m) {
-    .table-wrapper.grouped {
-        .lib-css(margin-left, -@layout__width-xs-indent);
-        .lib-css(margin-right, -@layout__width-xs-indent);
+    .product-add-form {
+        .table-wrapper.grouped {
+            .lib-css(margin-left, -@layout__width-xs-indent);
+            .lib-css(margin-right, -@layout__width-xs-indent);
+            .table.data.grouped {
+                tr {
+                    td {
+                        padding: 5px 10px 5px 15px;
+                    }
+                }
+            }
+        }
     }
 }
 
diff --git a/app/design/frontend/Magento/luma/Magento_Theme/web/css/source/_module.less b/app/design/frontend/Magento/luma/Magento_Theme/web/css/source/_module.less
index f3e0f810481ed..c5ad329a17c52 100644
--- a/app/design/frontend/Magento/luma/Magento_Theme/web/css/source/_module.less
+++ b/app/design/frontend/Magento/luma/Magento_Theme/web/css/source/_module.less
@@ -464,7 +464,7 @@
 
 .media-width(@extremum, @break) when (@extremum = 'max') and (@break = @screen__m) {
     .cms-page-view .page-main {
-        padding-top: 41px;
+        padding-top: 0;
         position: relative;
     }
 }
diff --git a/dev/tests/static/testsuite/Magento/Test/Integrity/ClassesTest.php b/dev/tests/static/testsuite/Magento/Test/Integrity/ClassesTest.php
index 5c1e342e1bc81..4b31b80f1d7b3 100644
--- a/dev/tests/static/testsuite/Magento/Test/Integrity/ClassesTest.php
+++ b/dev/tests/static/testsuite/Magento/Test/Integrity/ClassesTest.php
@@ -191,7 +191,7 @@ private function assertClassesExist($classes, $path)
         foreach ($classes as $class) {
             $class = trim($class, '\\');
             try {
-                if (strrchr($class, '\\') === false and !Classes::isVirtual($class)) {
+                if (strrchr($class, '\\') === false && !Classes::isVirtual($class)) {
                     $badUsages[] = $class;
                     continue;
                 } else {
diff --git a/lib/internal/Magento/Framework/Filter/Template.php b/lib/internal/Magento/Framework/Filter/Template.php
index 40799bfe0a6b5..a2e772853efcb 100644
--- a/lib/internal/Magento/Framework/Filter/Template.php
+++ b/lib/internal/Magento/Framework/Filter/Template.php
@@ -227,7 +227,7 @@ public function templateDirective($construction)
     {
         // Processing of {template config_path=... [...]} statement
         $templateParameters = $this->getParameters($construction[2]);
-        if (!isset($templateParameters['config_path']) or !$this->getTemplateProcessor()) {
+        if (!isset($templateParameters['config_path']) || !$this->getTemplateProcessor()) {
             // Not specified template or not set include processor
             $replacedValue = '{Error in template processing}';
         } else {
diff --git a/lib/internal/Magento/Framework/Message/Manager.php b/lib/internal/Magento/Framework/Message/Manager.php
index f31892a938fb1..4e73b6112f9d8 100644
--- a/lib/internal/Magento/Framework/Message/Manager.php
+++ b/lib/internal/Magento/Framework/Message/Manager.php
@@ -11,6 +11,8 @@
 
 /**
  * Message manager model
+ *
+ * @SuppressWarnings(PHPMD.CookieAndSessionMisuse)
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
  */
 class Manager implements ManagerInterface
@@ -226,7 +228,7 @@ public function addUniqueMessages(array $messages, $group = null)
         $items = $this->getMessages(false, $group)->getItems();
 
         foreach ($messages as $message) {
-            if ($message instanceof MessageInterface and !in_array($message, $items, false)) {
+            if ($message instanceof MessageInterface && !in_array($message, $items, false)) {
                 $this->addMessage($message, $group);
             }
         }
diff --git a/setup/src/Magento/Setup/Model/ConfigOptionsList/Session.php b/setup/src/Magento/Setup/Model/ConfigOptionsList/Session.php
index 3b3fbf33a02e2..b5fbfd795363f 100644
--- a/setup/src/Magento/Setup/Model/ConfigOptionsList/Session.php
+++ b/setup/src/Magento/Setup/Model/ConfigOptionsList/Session.php
@@ -124,7 +124,7 @@ class Session implements ConfigOptionsListInterface
     ];
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
      */
     public function getOptions()
@@ -250,7 +250,7 @@ public function getOptions()
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function createConfig(array $options, DeploymentConfig $deploymentConfig)
     {
@@ -281,7 +281,7 @@ public function createConfig(array $options, DeploymentConfig $deploymentConfig)
     }
 
     /**
-     * {@inheritdoc}
+     * @inheritdoc
      */
     public function validate(array $options, DeploymentConfig $deploymentConfig)
     {
@@ -301,7 +301,7 @@ public function validate(array $options, DeploymentConfig $deploymentConfig)
 
         if (isset($options[self::INPUT_KEY_SESSION_REDIS_LOG_LEVEL])) {
             $level = $options[self::INPUT_KEY_SESSION_REDIS_LOG_LEVEL];
-            if (($level < 0) or ($level > 7)) {
+            if (($level < 0) || ($level > 7)) {
                 $errors[] = "Invalid Redis log level '{$level}'. Valid range is 0-7, inclusive.";
             }
         }