Fix long standing regressionAfter https://cvs.openacs.org/changelog/OpenACS?cs=MAIN%3Adaveb%3A20080908165252, in template::list::write_csv we started looping through the list "elements", rather than the "display_elements". This prevents specifying different sets of columns to be returned depending on the "-formats" and "-selected_format" options in template::list::create. Many thanks to Oasi Software that customized this proc a long time ago, so that I could realize where the problem was.
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