message: README fixes (thanks
diff: @@ -82,8 +82,8 @@ For instance:
  Multiple BAM files may be given for joint calling.
  Typically, we might consider two additional parameters.
  -GVCF output allows us to have coverage information about non-called sites, and we can enable it with `--gcvcf`.
  -For performance reasons we may want to skip regions of extremely high coverage in the reference using the `--skip-limit` parameter `-g`.
  +GVCF output allows us to have coverage information about non-called sites, and we can enable it with `--gvcf`.
  +For performance reasons we may want to skip regions of extremely high coverage in the reference using the `--skip-coverage` parameter or `-g`.
  These can greatly increase runtime but do not produce meaningful results.
  For instance, if we wanted to exclude regions of 1000X coverage, we would run:
  