I have a customised module that imports items from feeds accessed via a third-party API. The items are used to create nodes for each instance. All the content appears to be importing correctly, but the feed includes character entities like '&' in some of the text imported. I've checked the CSVs being imported and the character entities are already in the feed content, so it isn't the module that's causing normal characters to be converted to character entities.
I'd like to know how I can get Drupal to convert the character entities to display as normal characters. Is there a module or setting that can do this?