if a tag value in RG header of a input BAM has '\t' (the literal string not a tab), star_mapping.pl will break.

[byb121]

star_mapping.pl uses PCAP-core::BAM::rg_line_for_output to get input BAM header line. The PCAP subroutine uses the literal string '\t' as the separator in its returning header line string, but in fact, this string is allowed in a SAM tag value, hence when it exists in an input BAM header, star_mapping.pl breaks.

Potential fixes depend on fixes of PCAP-core: cancerit/PCAP-core#47

This is a bug, but in a very low priority to fix, as it should really only affect the edge case
that I stated is this issue.