Improve debug output of entity metadata wrapper exceptions.

includes/entity.wrapper.inc

@@ -121,7 +121,7 @@ abstract class EntityMetadataWrapper {
     if (!$this->validate($value)) {
       throw new EntityMetadataWrapperException(t('Invalid data value given. Be sure it matches the required data type and format. Value at !location: !value.', array(
         // An exception's message is output through check_plain().
-        '!value' => is_array($value) || is_object($value) ? var_export($value) : $value,
+        '!value' => is_array($value) || is_object($value) ? var_export($value, TRUE) : $value,
         '!location' => $this->debugIdentifierLocation(),
       )));
     }
@@ -755,7 +755,7 @@ class EntityDrupalWrapper extends EntityStructureWrapper {
     if (!$this->validate($value)) {
       throw new EntityMetadataWrapperException(t('Invalid data value given. Be sure it matches the required data type and format. Value at !location: !value.', array(
         // An exception's message is output through check_plain().
-        '!value' => is_array($value) || is_object($value) ? var_export($value) : $value,
+        '!value' => is_array($value) || is_object($value) ? var_export($value, TRUE) : $value,
         '!location' => $this->debugIdentifierLocation(),
       )));
     }