Text to go in the release notes:
This fixes the CSV export so that data is correctly exported with a tab (\t) as the separator when this format is selected. This was incorrectly using the word 'tabulation' as the separator. (The default export format is set using the CSVdelimiter system preference.) In addition, the code where this is used was simplified (including several of the default reports, item search export, and the log viewer), and the default for CSVdelimiter was set to the comma separator.