How do I get the slash "/" to disappear from my BOM header columns?

On tabulated BOMs, I want to show each configuration name and then QTY.  

in the settings, I went to tables, BOMs, and for top level only BOM I checked "show custom text in BOM header" and entered QTY.  I also checked show configuration in BOM header.

doing so does what I want, but it shows the configuration/QTY. if I edit the cell to try