Fixed typo error

Author: gelanivishal

app/code/Magento/Config/Block/System/Config/Form.php

@@ -709,7 +709,7 @@ protected function _getAdditionalElementTypes()
     }
 
     /**
-     * Temporary moved those $this->getRequest()->getParam('blabla') from the code accross this block
+     * Temporary moved those $this->getRequest()->getParam('blabla') from the code across this block
      * to getBlala() methods to be later set from controller with setters
      */
 

app/code/Magento/ConfigurableImportExport/Model/Import/Product/Type/Configurable.php

@@ -637,7 +637,7 @@ protected function _insertData()
     }
 
     /**
-     * Get new supper attribute id.
+     * Get new super attribute id.
      *
      * @return int
      */

app/code/Magento/Customer/Model/Session.php

@@ -555,7 +555,7 @@ public function setAfterAuthUrl($url)
     }
 
     /**
-     * Reset core session hosts after reseting session ID
+     * Reset core session hosts after resetting session ID
      *
      * @return $this
      */