Add spellchecker scripts for Octave and run spellcheck of documentation interpreter/doccheck: New directory for spelling/grammar scripts. interpreter/doccheck/README: Instructions for using scripts. interpreter/doccheck/spellcheck: Script to spellcheck a Texinfo file. interpreter/doccheck/aspell.conf: GNU Aspell configuration file for Octave documentation. interpreter/doccheck/aspell-octave.en.pws: Private Aspell dictionary. interpreter/doccheck/add_to_aspell_dict: Script to add new Octave-specific words to private Aspell dictionary. interpreter/octave.texi: New @nospell macro which forces Aspell to ignore the word marked by the macro. interpreter/mk_doc_cache.m: Skip new @nospell macro when building doc_cache.

--- a/doc/interpreter/octave.texi	Thu Jul 15 12:15:14 2010 +0200
+++ b/doc/interpreter/octave.texi	Sat Jul 17 19:53:01 2010 -0700
@@ -39,6 +39,14 @@
 @strong{See also:} \args\.
 @end macro
 
+@c The following macro marks words that aspell should ignore during
+@c spellchecking.  Within Texinfo it has no effect as it merely replaces
+@c the macro call with the argument itself.
+
+@macro nospell {arg}
+\arg\
+@end macro
+
 @ifinfo
 @format
 START-INFO-DIR-ENTRY
@@ -543,7 +551,7 @@
 * Stem Series::                 
 * Surface group::               
 
-Graphics backends
+Graphics Backends
 
 * Interaction with gnuplot::