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/rosser.m
+++ b/scripts/special-matrix/rosser.m
@@ -21,8 +21,7 @@
 ## Return the Rosser matrix.  This is a difficult test case used to evaluate
 ## eigenvalue algorithms.
 ##
-## @seealso{hankel, vander, sylvester_matrix, hilb, invhilb, toeplitz,
-##          hadamard, wilkinson, compan, pascal}
+## @seealso{wilkinson, eig}
 ## @end deftypefn
 
 ## Author: Peter Ekberg
@@ -42,6 +41,7 @@
             -52,   -43,    49,    44,  -599,   411,   208,   208;
             -49,    -8,     8,    59,   208,   208,    99,  -911;
              29,   -44,    52,   -23,   208,   208,  -911,    99];
+
 endfunction
 
 %!assert (size(rosser()), [8,8])