commandblock output displays{"text'."@"}

Environment
windows 10
minecraft 1.13 pre6
Created Issue:
commandblock output displays{"text'."@"}
Environment
windows 10
minecraft 1.13 pre6
Changed Description:
Added Attachments:
Added Fixed Versions: 1.13.1

This is not a bug. To turn off this type "/gamerule commandBlockOutput false"
Cannot confirm. It normally displays @ instead for me.
Please check if that's still an issue in 1.13.1.
Unable to reproduce in 1.13.1. Fixed?