doc: Use Octave coding conventions in @example blocks of docstrings. * accumarray.m, accumdim.m, bar.m, base2dec.m, bincoeff.m, bitcmp.m, bitset.m, celldisp.m, chop.m, clabel.m, cloglog.m, colon.m, compass.m, computer.m, contour3.m, contourc.m, corr.m, cstrcat.m, ctime.m, cylinder.m, date.m, dec2base.m, demo.m, dir.m, dlmwrite.m, expm.m, ezcontourf.m, ezcontour.m, ezmeshc.m, ezmesh.m, ezplot.m, ezsurfc.m, ezsurf.m, feather.m, findobj.m, flipdim.m, fplot.m, genvarname.m, getfield.m, hankel.m, hilb.m, hist.m, idivide.m, index.m, int2str.m, interp1.m, is_leap_year.m, ismember.m, isocolors.m, isonormals.m, isosurface.m, kurtosis.m, legendre.m, linkprop.m, logit.m, logm.m, __makeinfo__.m, __marching_cube__.m, median.m, mkoctfile.m, moment.m, mpoles.m, orderfields.m, pcg.m, pcr.m, plot3.m, plotmatrix.m, polyaffine.m, polygcd.m, poly.m, polyout.m, print.m, qp.m, quadgk.m, qzhess.m, randi.m, rat.m, refreshdata.m, residue.m, rose.m, rot90.m, saveas.m, saveobj.m, shiftdim.m, skewness.m, spaugment.m, spdiags.m, sqp.m, stem.m, str2num.m, strcat.m, strjust.m, strread.m, strsplit.m, structfun.m, subplot.m, subsindex.m, substruct.m, surfl.m, surfnorm.m, svds.m, uimenu.m, union.m, voronoi.m, warning_ids.m, wblpdf.m: Use Octave coding conventions in @example blocks of docstrings.

--- a/scripts/plot/stem.m
+++ b/scripts/plot/stem.m
@@ -39,7 +39,7 @@
 ## @example
 ## @group
 ## x = 1:10;
-## y = ones (1, length (x))*2.*x;
+## y = 2*x;
 ## stem (x, y, "r");
 ## @end group
 ## @end example
@@ -55,7 +55,7 @@
 ##
 ## @example
 ## @group
-## x = [0 : 10]';
+## x = [0:10]';
 ## y = [sin(x), cos(x)]
 ## h = stem (x, y);
 ## set (h(2), "color", "g");
@@ -64,7 +64,7 @@
 ## @end example
 ##
 ## @noindent
-## changes the color of the second "stem series"  and moves the base line
+## changes the color of the second "stem series" and moves the base line
 ## of the first.
 ## @seealso{bar, barh, plot}
 ## @end deftypefn