maint: Use Octave coding conventions in scripts/ode/private dir. * AbsRel_Norm.m, fuzzy_compare.m, hermite_quartic_interpolation.m, integrate_adaptive.m, integrate_const.m, integrate_n_steps.m, kahan.m, ode_struct_value_check.m, odepkg_event_handle.m, odepkg_structure_check.m, runge_kutta_45_dorpri.m, starting_stepsize.m: Wrap long lines to < 80 chars. Use double quotes rather than single quotes where possible. Use ';' at end of keywords "return;" and "break;" Use '##" for stand-alone comments and '#' for end-of-line comments. Use two spaces after period before starting new sentence. Use '!' instead of '~' for logical negation. Use specific form of end (endif, endfor, etc.). Don't use line continuation marker '...' unless necessary.

--- a/scripts/ode/private/kahan.m	Sun Oct 04 16:24:32 2015 +0100
+++ b/scripts/ode/private/kahan.m	Sun Oct 04 22:18:54 2015 -0700
@@ -17,7 +17,7 @@
 ## <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn  {Function File} {[@var{sum}] =} kahan (@var{sum}, @var{comp}, @var{temp})
+## @deftypefn  {Function File} {@var{sum} =} kahan (@var{sum}, @var{comp}, @var{temp})
 ## @deftypefnx {Function File} {[@var{sum}, @var{comp}] =} kahan (@var{sum}, @var{comp}, @var{temp})
 ##
 ## This function is the implementation of the Kahan summation algorithm,
@@ -51,6 +51,3 @@
 
 endfunction
 
-## Local Variables: ***
-## mode: octave ***
-## End: ***