I don't think these are "redundant quotes" but rather ditto marks:

https://en.wikipedia.org/wiki/Ditto_mark

this is quite clear here, for example:

>       u_int64_t p_uru_nvcsw;          /* LONG: voluntary context switches. */
> -     u_int64_t p_uru_nivcsw;         /* LONG: involuntary ". */
> +     u_int64_t p_uru_nivcsw;         /* LONG: involuntary. */

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