@Fred I suspect it’s because that option is quite long and it’s probably an edge case bug. To gather some more info it would be good to know what white-space setting it’s defaulting to - if you switch to “computed” tab in the dev tools it’ll show you if it’s inheriting a style from somewhere or using the default. Also try editing the source and adding spaces around the / to see if it wraps cleanly. One more thing to try is editing the source and making the name much longer with no spaces and seeing what happens.
The styling was added last year. @jkuester Do you have any recollection of what the style is there for?