doc: Use Octave preference for double quote in docstrings in scripts/ * interp1.m, interp2.m, interp3.m, interpn.m, profexplore.m, profile.m, profshow.m, quadgk.m, lookfor.m, imagesc.m, bzip2.m, gzip.m, parseparams.m, pkg.m, ancestor.m, caxis.m, ezmesh.m, ezmeshc.m, ezsurf.m, ezsurfc.m, hidden.m, hold.m, patch.m, pie.m, pie3.m, quiver.m, quiver3.m, scatter3.m, uicontextmenu.m, uicontrol.m, uipanel.m, uipushtool.m, uitoggletool.m, uitoolbar.m, xlim.m, ylim.m, zlim.m, ismember.m, setxor.m, filter2.m, bicg.m, demo.m, example.m, fail.m, test.m: Use Octave preference for double quote in docstrings in scripts/ directory.

--- a/scripts/plot/pie3.m
+++ b/scripts/plot/pie3.m
@@ -30,7 +30,7 @@
 ## size of the values of @var{x}.
 ##
 ## The variable @var{explode} is a vector of the same length as @var{x} that
-## if non zero 'explodes' the slice from the pie chart.
+## if non zero "explodes" the slice from the pie chart.
 ##
 ## If given @var{labels} is a cell array of strings of the same length as
 ## @var{x}, giving the labels of each of the slices of the pie chart.