clean target: Remove intermediate files from creation of outline in PDF.
diff --git a/Doc/Makefile b/Doc/Makefile
index c727638..e1fdc07 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -317,7 +317,7 @@
# - useful results: .dvi, .pdf, .ps, .texi, .info
clean:
rm -f @* *~ *.aux *.idx *.ilg *.ind *.log *.toc *.blg *.bbl *.py[co]
- rm -f *.bak *.orig lib1.texi *.out @webchecker.pickle
+ rm -f *.bak *.orig lib1.texi *.out @webchecker.pickle *.bkm
rm -f html-$(RELEASE).tar.gz info-$(RELEASE).tar.gz
rm -f pdf-$(RELEASE).tar.gz postscript-$(RELEASE).tar.gz
rm -f latex-$(RELEASE).tar.gz