Skip test on old octave for formatting changes

See also `heaviside.m`.

Author: cbm755

inst/@double/bernoulli.m

@@ -35,6 +35,8 @@
 %% Note there are two conventions in the literature about the sign of B_1:
 %% @example
 %% @group
+%% @c Would render with an extra zero on earlier Octave
+%% @c doctest: +SKIP_IF(compare_versions (OCTAVE_VERSION(), '6.0.0', '<'))
 %% abs (bernoulli (1))
 %%   @result{} 0.5000
 %% @end group

inst/heaviside.m

@@ -1,5 +1,5 @@
 %% Copyright (C) 2006 Sylvain Pelissier <[email protected]>
-%% Copyright (C) 2015-2016 Colin B. Macdonald <[email protected]>
+%% Copyright (C) 2015-2016, 2019, 2022 Colin B. Macdonald <[email protected]>
 %%
 %% This program is free software; you can redistribute it and/or modify it under
 %% the terms of the GNU General Public License as published by the Free Software
@@ -35,6 +35,7 @@
 %% function returns 0.5 by default:
 %% @example
 %% @group
+%% @c Would render with an extra zero on earlier Octave
 %% @c doctest: +SKIP_IF(compare_versions (OCTAVE_VERSION(), '6.0.0', '<'))
 %% heaviside(0)
 %%   @result{} 0.5000