This documentation string provided in the "config/example/gem5_library/riscvmatched-fs.py" was minimal. This patch adds more detail. Change-Id: I0f203ea6952fc72a078594d7c30853bd426017ff Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65851 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65972