diff --git a/core/nwb.file.yaml b/core/nwb.file.yaml
index fc15800..c3da4af 100644
--- a/core/nwb.file.yaml
+++ b/core/nwb.file.yaml
@@ -132,8 +132,8 @@ groups:
         doc: TimeSeries objects containing data of presented stimuli.
         quantity: '*'
       - neurodata_type_inc: NWBDataInterface
-        doc: 'Generic NWB data interfaces, usually from an extension, '
-          'containing data of presented stimuli.'
+        doc: 'Generic NWB data interfaces, usually from an extension,
+          containing data of presented stimuli.'
         quantity: '*'
       - neurodata_type_inc: DynamicTable
         doc: DynamicTable objects containing data of presented stimuli.