doc: Review and update documentation for "Matrix Manipulation" chapter. * matrix.txi, arrayfun.m, blkdiag.m, fliplr.m, flipud.m, logspace.m, postpad.m, prepad.m, randi.m, repmat.m, rot90.m, rotdim.m, shiftdim.m, sortrows.m, vech.m, xor.m, hadamard.m, hankel.m, hilb.m, invhilb.m, magic.m, pascal.m, rosser.m, sylvester_matrix.m, toeplitz.m, vander.m, wilkinson.m, bsxfun.cc, find.cc, lookup.cc, rand.cc, tril.cc, data.cc, arrayfun.m, blkdiag.m, fliplr.m, flipud.m, logspace.m, postpad.m, prepad.m, randi.m, repmat.m, rot90.m, rotdim.m, shiftdim.m, sortrows.m, vech.m, xor.m, hadamard.m, hankel.m, hilb.m, invhilb.m, magic.m, pascal.m, rosser.m, sylvester_matrix.m, toeplitz.m, vander.m, wilkinson.m, bsxfun.cc (bsxfun), find.cc (find), lookup.cc (lookup), rand.cc (rand, randn, rande, randg, randp), tril.cc (triu), data.cc (all, any, horzcat, vertcat, cat, permute, ipermute, ones, zeros, eye, linspace, resize, reshape, issorted, diff): Improve docstrings

--- a/scripts/special-matrix/hankel.m	Tue Apr 26 11:27:28 2011 -0700
+++ b/scripts/special-matrix/hankel.m	Sun May 01 08:55:15 2011 -0700
@@ -19,7 +19,7 @@
 ## -*- texinfo -*-
 ## @deftypefn  {Function File} {} hankel (@var{c})
 ## @deftypefnx {Function File} {} hankel (@var{c}, @var{r})
-## Return the Hankel matrix constructed given the first column @var{c}, and
+## Return the Hankel matrix constructed from the first column @var{c}, and
 ## (optionally) the last row @var{r}.  If the last element of @var{c} is
 ## not the same as the first element of @var{r}, the last element of
 ## @var{c} is used.  If the second argument is omitted, it is assumed to
@@ -42,7 +42,7 @@
 ## @end example
 ##
 ## @end ifnottex
-## @seealso{vander, sylvester_matrix, hilb, invhilb, toeplitz}
+## @seealso{hadamard, toeplitz}
 ## @end deftypefn
 
 ## Author: jwe