Only use 4 columns in the module index, to accomodate platform annotations.
diff --git a/Doc/html/Makefile b/Doc/html/Makefile
index 1119576..df07dd4 100644
--- a/Doc/html/Makefile
+++ b/Doc/html/Makefile
@@ -52,7 +52,7 @@
$(INDEXFILES): $(COMMONPERL) $(TOPDIR)/html/about.dat
modindex.html: lib/lib.html mac/mac.html $(TOOLSDIR)/mkmodindex
- $(TOOLSDIR)/mkmodindex --columns 5 --output modindex.html \
+ $(TOOLSDIR)/mkmodindex --columns 4 --output modindex.html \
lib/modindex.html mac/modindex.html
api/api.html: $(PAPERDIR)/api.aux $(BUILDINDEX)