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/geometry/delaunayn.m	Mon Feb 23 16:42:25 2015 +0000
+++ b/scripts/geometry/delaunayn.m	Mon Feb 23 14:54:39 2015 -0800
@@ -96,8 +96,8 @@
 %! x = [-1, -1, 1, 0, -1]; y = [-1, 1, 1, 0, -1]; z = [0, 0, 0, 1, 1];
 %! assert (sortrows (sort (delaunayn ([x(:) y(:) z(:)]), 2)), [1,2,3,4;1,2,4,5])
 
-%% FIXME: Need tests for delaunayn
+## FIXME: Need tests for delaunayn
 
-%% Input validation tests
+## Input validation tests
 %!error delaunayn ()