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When trying to figure out why our Excel-and-CSV importer didn’t like an Excel spreadsheet a client sent us, the real issue turned out to be…unexpected:
$ file /var/www/htdocs/eRezLife/carleton/erez/uploads/user_temp/3/student_import.xls
/var/www/htdocs/eRezLife/carleton/erez/uploads/user_temp/3/student_import.xls: ASCII text
…Why‽
