Bug 27045: (follow-up) Fix delimiter in header rows

Bug 27045: (follow-up) Fix delimiter in header rows

The header rows still showed \t because the newly defined
variable wasn't used there.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 2eea061ca30e4810b07ca2920bfe1e55762fab02)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit ed114537d3a965bc5f636e4f138cdf35c2515d3b)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>