RibosomeProfiling.nf : fix typo beug in coverage process

src/RibosomeProfiling.nf

@@ -589,7 +589,7 @@ process coverage {
  params.do_postgenome==false
  shell:
  '''
- genome=$(samtools view !{bam[0]} | awk '{print $1} | sort | uniq | wc -l)
+ genome=$(samtools view !{bam[0]} | awk '{print $1}' | sort | uniq | wc -l)
  factor=$(awk -v c=$genome 'BEGIN {print 1000000/c}')
  bamCoverage -p !{task.cpus} --binSize 1 -b !{bam[0]} -o !{file_id}.bigwig
  '''