Looks like a bad copy paste in the the headers template: "[% t("Damaged status") | html %]"[% t("Date accessioned") | html %]"[%- delimiter | $raw -%]"[%- delimiter | $raw -%]"
Created attachment 186934 [details] [review] Bug 40880: Correct columns headers for CSV export from item search To test: 1 - Do an item search, select some rows 2 - Export selected rows as 'CSV' 3 - IMport into a spreadsheet or view and note missing/doubled delimiters after damaged status 4 - Apply patch 5 - Repeat export 6 - It works!
Simple self SO