add example for -sub option for sequence/fasta2tab
add example for -sub option for sequence/fasta2tab

zctea/bio_scripts,shenwei356/bio_scripts,DawnEve/bio_scripts,DawnEve/bio_scripts,DawnEve/bio_scripts,zctea/bio_scripts,zctea/bio_scripts,shenwei356/bio_scripts,DawnEve/bio_scripts,shenwei356/bio_scripts,shenwei356/bio_scripts,zctea/bio_scripts,zctea/bio_scripts,DawnEve/bio_scripts