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/plot/util/__actual_axis_position__.m
+++ b/scripts/plot/util/__actual_axis_position__.m
@@ -66,7 +66,7 @@
                              axis_obj.plotboxaspectratio(3)/sqrt(2)];
     endif
     orig_aspect_ratio_2d = pos_in_pixels(3:4);
-    rel_aspect_ratio_2d =  aspect_ratio_2d ./ orig_aspect_ratio_2d;
+    rel_aspect_ratio_2d = aspect_ratio_2d ./ orig_aspect_ratio_2d;
     rel_aspect_ratio_2d = rel_aspect_ratio_2d ./ max (rel_aspect_ratio_2d);
     if (rel_aspect_ratio_2d(1) < rel_aspect_ratio_2d(2));
       dx = (1.0 - rel_aspect_ratio_2d(1)) * pos_in_pixels(3);