Escape sbios, can have commas on some systems

[skyreflectedinmirrors]

Not sure if the other fields can do this either (at a guess, we might just want to escape anything that's not known to be a number), but this fixes the system-info table on my machine

[feizheng10]

right, other fields are not complicated like sbios string.

[coleramos425]

@skyreflectedinmirrors if you don't mind, I moved str casting into the parent function for consistency. Other than that, looks good. Thanks!

Update Realized that my change doesn't correctly catch escape characters. Oops. I'll change it back!