doc: Miscellaneous small tweaks to documentation for consistency. * doc/interpreter/external.txi: Don't group EXAMPLEFILEs which are longer than 20 lines. * doc/interpreter/oop.txi: Don't group EXAMPLEFILEs which are longer than 20 lines. * doc/interpreter/octave.texi: Eliminate trailing whitespace. * doc/interpreter/tips.txi: Eliminate trailing whitespace. * examples/mysparse.c: Eliminate trailing whitespace. * scripts/miscellaneous/compare_versions.m: use @qcode macro. * scripts/plot/gnuplot_binary.in: use @qcode macro. * scripts/statistics/tests/kruskal_wallis_test.m: use @cite macro.

--- a/scripts/plot/gnuplot_binary.in
+++ b/scripts/plot/gnuplot_binary.in
@@ -22,7 +22,7 @@
 ## Query or set the name of the program invoked by the plot command
 ## when the graphics toolkit is set to "gnuplot".  Additional arguments to
 ## pass to the external plotting program may also be given.
-## The default value is @code{"gnuplot"} with no additional arguments.
+## The default value is @qcode{"gnuplot"} with no additional arguments.
 ## @xref{Installation}.
 ## @seealso{graphics_toolkit}
 ## @end deftypefn