Samtools v1 is released. I found some new symbols in the samtools mpileup results. The command I used is samtools mpileup -l $snpPos -f $REFfa -sO -o res.mpileup samp.bam. In the 5th column of the result file, some new symbols appeared (see symbols = and ~ below). These are two examples of part of the long string:

.....T...........^$.^$.^$.^".^$.^".^$.^".
T.TTTT....TT...TT,,......,^~.^~.^~.^~.^~.

For most symbols, they are explained before. But what are the meaning of the new symbols colored in yellow? Is there a document mentioning these changes? Thanks!