Diagram plotting in QCD doesn't work with anti particles

[Bijan Chokoufe Nejad]

The following

model = QCD
process uubar = u, U => d, D {?diags = true}
compile

fails with

! Text line contains an invalid character.
l.18 \section{$ u ^^H
                     ar{u} \to d ^^Har{d} $}

In the tex file, you find ^H characters instead of \b (some escaping gone wrong?). Changing model = QCD to model = SM works, although both in SM.mdl and in QCD.mdl, we find tex_anti "\bar{d}" and so on.

[Juergen Reuter]

Obviously escape characters, fixed in r6275.