corrected versioning samtools customview

    cat <<-END_VERSIONS > versions.yml

    ${getProcessName(task.process)}:

        ${getSoftwareName(task.process)}: \$(samtools --version 2>&1 | sed 's/^.*samtools //; s/Using.*\$//')

        ${getSoftwareName(task.process)}: \$(echo \$(samtools --version 2>&1) | sed 's/^.*samtools //; s/Using.*\$//')

    END_VERSIONS

    """

}