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/src/DLD-FUNCTIONS/sqrtm.cc	Thu Jul 15 12:15:14 2010 +0200
+++ b/src/DLD-FUNCTIONS/sqrtm.cc	Sat Jul 17 19:53:01 2010 -0700
@@ -217,9 +217,9 @@
 @deftypefn {Loadable Function} {[@var{result}, @var{error_estimate}] =} sqrtm (@var{a})\n\
 Compute the matrix square root of the square matrix @var{a}.\n\
 \n\
-Ref: Nicholas J. Higham.  A new sqrtm for @sc{matlab}.  Numerical Analysis\n\
-Report No. 336, Manchester Centre for Computational Mathematics,\n\
-Manchester, England, January 1999.\n\
+Ref: N.J. Higham.  @cite{A New sqrtm for @sc{matlab}}.  Numerical\n\
+Analysis Report No. 336, Manchester @nospell{Centre} for Computational\n\
+Mathematics, Manchester, England, January 1999.\n\
 @seealso{expm, logm}\n\
 @end deftypefn")
 {