Update method doc blocks

Fixes according to static test failures

Author: ishakhsuvarov

app/code/Magento/Sales/Model/Order/Email/Sender.php

@@ -65,6 +65,8 @@ public function __construct(
     }
 
     /**
+     * Send order email if it is enabled in configuration.
+     * 
      * @param Order $order
      * @return bool
      */
@@ -94,6 +96,8 @@ protected function checkAndSend(Order $order)
     }
 
     /**
+     * Populate order email template with customer information.
+     *
      * @param Order $order
      * @return void
      */
@@ -115,6 +119,8 @@ protected function prepareTemplate(Order $order)
     }
 
     /**
+     * Create Sender object using appropriate template and identity.
+     *
      * @return Sender
      */
     protected function getSender()
@@ -128,6 +134,8 @@ protected function getSender()
     }
 
     /**
+     * Get template options.
+     *
      * @return array
      */
     protected function getTemplateOptions()
@@ -139,6 +147,8 @@ protected function getTemplateOptions()
     }
 
     /**
+     * Render shipping address into html.
+     *
      * @param Order $order
      * @return string|null
      */
@@ -150,6 +160,8 @@ protected function getFormattedShippingAddress($order)
     }
 
     /**
+     * Render billing address into html.
+     *
      * @param Order $order
      * @return string|null
      */