diff -up octave-4.0.0/doc/liboctave/Makefile.in.texinfo6 octave-4.0.0/doc/liboctave/Makefile.in
--- octave-4.0.0/doc/liboctave/Makefile.in.texinfo6	2015-05-26 10:21:42.000000000 -0600
+++ octave-4.0.0/doc/liboctave/Makefile.in	2015-07-14 10:40:50.131788830 -0600
@@ -1854,7 +1854,6 @@ localstartupfiledir = ${localfcnfiledir}
 # The separator used for elements of the LD_PRELOAD variable (might be
 # a space, so protect with $(null))
 null = 
-TEXINFO_TEX = ../texinfo.tex
 info_TEXINFOS = liboctave.texi
 liboctave_TEXINFOS = \
   array.texi \
diff -up octave-4.0.0/libinterp/corefcn/utils.cc.texinfo6 octave-4.0.0/libinterp/corefcn/utils.cc
--- octave-4.0.0/libinterp/corefcn/utils.cc.texinfo6	2015-05-23 08:21:53.000000000 -0600
+++ octave-4.0.0/libinterp/corefcn/utils.cc	2015-07-14 09:46:17.300468145 -0600
@@ -22,7 +22,7 @@ along with Octave; see the file COPYING.
 */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+#include "config.h"
 #endif
 
 #include <cerrno>
@@ -1379,7 +1379,7 @@ indexing using @var{ind} will not perfor
 \n\
 Implementation Note: Strings are first converted to double values before the\n\
 checks for valid indices are made.  Unless a string contains the NULL\n\
-character @nospell{\"\\0\"}, it will always be a valid index.\n\
+character @nospell{\"@xbackslashchar{}0\"}, it will always be a valid index.\n\
 @end deftypefn")
 {
   octave_value retval;
diff -up octave-4.0.0/scripts/io/beep.m.texinfo6 octave-4.0.0/scripts/io/beep.m
--- octave-4.0.0/scripts/io/beep.m.texinfo6	2015-05-23 08:21:53.000000000 -0600
+++ octave-4.0.0/scripts/io/beep.m	2015-07-14 09:46:16.894469886 -0600
@@ -20,9 +20,9 @@
 ## @deftypefn {Function File} {} beep ()
 ## Produce a beep from the speaker (or visual bell).
 ##
-## This function sends the alarm character @qcode{"\a"} to the terminal.
-## Depending on the user's configuration this may produce an audible beep,
-## a visual bell, or nothing at all.
+## This function sends the alarm character @qcode{"@xbackslashchar{}a"} to
+## the terminal. Depending on the user's configuration this may produce an
+## audible beep, a visual bell, or nothing at all.
 ## @seealso{puts, fputs, printf, fprintf}
 ## @end deftypefn