maint: Clean up m-files to follow Octave coding conventions. Try to trim long lines to < 80 chars. Use '##' for single line comments. Use '(...)' around tests for if/elseif/switch/while. Abut cell indexing operator '{' next to variable. Abut array indexing operator '(' next to variable. Use space between negation operator '!' and following expression. Use two newlines between endfunction and start of %!test or %!demo code. Remove unnecessary parens grouping between short-circuit operators. Remove stray extra spaces (typos) between variables and assignment operators. Remove stray extra spaces from ends of lines.

--- a/scripts/special-matrix/toeplitz.m	Mon Feb 23 16:42:25 2015 +0000
+++ b/scripts/special-matrix/toeplitz.m	Mon Feb 23 14:54:39 2015 -0800
@@ -125,7 +125,7 @@
 %!assert (toeplitz ([1, 2, 3], [1; -3; -5]), [1, -3, -5; 2, 1, -3; 3, 2, 1])
 %!assert (toeplitz ([1, 2, 3], [1; -3i; -5i]), [1, -3i, -5i; 2, 1, -3i; 3, 2, 1])
 
-%% Test input validation
+## Test input validation
 %!error toeplitz ()
 %!error toeplitz (1, 2, 3)
 %!error <C must be a vector> toeplitz ([1, 2; 3, 4])