On Sun, Oct 02, 2022 at 12:52:05PM +0100, Gavin Smith wrote: > The only thing I could find is this page from 2014: > > https://tex.stackexchange.com/questions/176931/how-to-escape-character-in-index > > but this only treats | in the math context. A commenter there says it > "confuses hyperref". > > The "hyperindexformat" texts appears to be something added by hyperref. > > Does anybody know (or know where we could ask) how to escape a | character > in an index entry correctly?
What I've done is strip out the | from the sort key as that is where it appears to cause the problem.
