To help tracking some strange behaviors before, I created a GIT repository of my KiCAD user’s files (%appdata/kicad%), I have noticed that sometimes the names in the fp-lib-table change from being surrounded with quotes to not surrounded by quotes.
Most probably, this is not a problem, but a weird behavior nonetheless.
Yes, those are the changes on the files according to GIT, I haven’t even use those libraries, I have worked normally with my board, I am not sure when the changes happen.
Adding a new footprint library changes the quotes from “Sockets”, “Valves” and “Varistors” in the fp-lib-table (first screenshot), adding a new symbol library changes the quotes from “Diodes” in the sym-lib-table (second screenshot).
Older versions of Kicad quote only when they have to (ie: when there’s a space in the string). That wasn’t helpful for many external tools, so 5.99 (and 6.0) always quote.