Follow up on array access deprecation

UPGRADE.md

@@ -2,7 +2,7 @@
 
 ## Deprecate array access
 
-Use array access on instances of the following classes is deprecated:
+Using array access on instances of the following classes is deprecated:
 
 - `Doctrine\ORM\Mapping\DiscriminatorColumnMapping`
 - `Doctrine\ORM\Mapping\EmbedClassMapping`

src/Persisters/Entity/BasicEntityPersister.php

@@ -1151,7 +1151,7 @@
 
             if (isset($this->class->fieldMappings[$fieldName])) {
                 $tableAlias = isset($this->class->fieldMappings[$fieldName]->inherited)
-                    ? $this->getSQLTableAlias($this->class->fieldMappings[$fieldName]['inherited'])
+                    ? $this->getSQLTableAlias($this->class->fieldMappings[$fieldName]->inherited)
                     : $baseTableAlias;
 
                 $columnName    = $this->quoteStrategy->getColumnName($fieldName, $this->class, $this->platform);

src/Query/SqlWalker.php

@@ -786,7 +786,7 @@
                 $class     = $this->getMetadataForDqlAlias($alias);
 
                 if (isset($class->associationMappings[$fieldName]->inherited)) {
-                    $class = $this->em->getClassMetadata($class->associationMappings[$fieldName]['inherited']);
+                    $class = $this->em->getClassMetadata($class->associationMappings[$fieldName]->inherited);
                 }
 
                 $association = $class->associationMappings[$fieldName];