Bug: TSV Separated formatter with rowmark produces comma separated output

[gasperno]

% cat version1.tsv
col_1	col_2	col_3
123	001	2.33
234	002	4.55
123	003	6.77
% cat version2.tsv
col_1	col_2	col_3
234	003	4.55
123	003	6.78

When I execute csvdiff -p 0,1 -s ‘\t’ -o rowmark version1.tsv version2.tsv,

Expectation

234	003	4.55	ADDED
123	003	6.78	MODIFIED
234	002	4.55	DELETED
123	001	2.33	DELETED

Actual

234	003	4.55,ADDED
123	003	6.78,MODIFIED
234	002	4.55,DELETED
123	001	2.33,DELETED

Why?

This makes it consistent and easier to parse the output for further processing.