Change texi2pdf call to include local TeX configuration file which increases save_history variable. The current pdf documentation cannot be built unless the save_size variable is increased from its value of 5000. On UNIX systems, not all users will have local root and the ability to change the default. I work around this by defining a local configuration file to use in addition to the system-wide texmf.cnf file.

--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2009-05-21  Rik  <rdrider0-list@yahoo.com>
+
+	* interpreter/Makefile.in, texmf.cnf: Change texi2pdf call to include local
+	TeX configuration file which increases save_history variable.
+
 2009-05-17  Rik  <rdrider0-list@yahoo.com>
 
 	* interpreter/tips.txi: Change recommendation to use @tex rather than