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/miscellaneous/getfield.m	Mon Feb 23 16:42:25 2015 +0000
+++ b/scripts/miscellaneous/getfield.m	Mon Feb 23 14:54:39 2015 -0800
@@ -60,7 +60,7 @@
 %! ss(1,2).fd(3).b(1,4) = 5;
 %! assert (getfield (ss,{1,2},"fd",{3},"b", {1,4}), 5);
 
-%% Test input validation
+## Test input validation
 %!error getfield ()
 %!error getfield (1)
 %!error <invalid index> getfield (1,2)