14.8.2.17 ‘:sep’ ................ The ‘:sep’ header argument can be used to control the delimiter used when writing tabular results out to files external to Org mode. This is used either when opening tabular results of a code block by calling the ‘org-open-at-point’ function bound to ‘C-c C-o’ on the code block, or when writing code block results to an external file (see file) header argument. By default, when ‘:sep’ is not specified output tables are tab delimited.