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For some reason it seems that texi2dvi -o no longer forces --clean mode, so we have stray TeX compilation files staying in top_builddir since TeX is run from there. While at it, upgrade the generation of the (completely obsolete) reference card. Target PDF. * doc/local.mk (TEXI2DVI): Pass --build-dir. (CLEANDIRS): More accurate. (doc/refcard.dvi): Replace with... (doc/refcard.pdf): this. Adjust dependencies.