Changes to some math using underscore as subscript, necessary since
the new style file defines underscore as an underscore in tt font.
diff --git a/Doc/Makefile b/Doc/Makefile
index bcc1afe..8559f6f 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -13,6 +13,7 @@
 ref:
 	touch ref.ind
 	latex ref
+	./fix_hack ref.idx
 	makeindex ref
 	latex ref
 	dvips ref >ref.ps
@@ -38,7 +39,7 @@
 	sh fix.sh
 
 clean:
-	rm -f @* *~ *.aux *.idx *.ilg *.ind *.log *.toc *.blg *.bbl
+	rm -f @* *~ *.aux *.idx *.ilg *.ind *.log *.toc *.blg *.bbl *.pyc
 	# Sources: .tex, .bib, .sty
 	# Useful results: .dvi, .ps