The mouseover on a cell in the 'Sequencer' column sometimes adds a "end of line" character (on the "-" character). (This seems to happen on every cell, but is only really visible when the cell contains a long string).

The "visual artefact" can be seen on this project (just mouseover the cells in the Sequencer column) : https://ng6.toulouse.inra.fr/index.php?id=55&tx_nG6_pi1%5Bproject_id%5D=289

It appears on: Google Chrome It doesn't appear on: Mozilla Firefox, Internet Explorer