Fix wc command: old version would have produced output that would not parse as int.
Fix wc command: old version would have produced output that would not parse as int.

broadinstitute/wdl,broadinstitute/wdl,openwdl/wdl,broadinstitute/wdl,openwdl/wdl,openwdl/wdl,broadinstitute/wdl,openwdl/wdl