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/testfun/demo.m
+++ b/scripts/testfun/demo.m
@@ -34,11 +34,11 @@
 ##
 ## @example
 ## @group
-##   %!demo
-##   %! t=0:0.01:2*pi; x = sin(t);
-##   %! plot (t,x)
-##   %! %-------------------------------------------------
-##   %! % the figure window shows one cycle of a sine wave
+## %!demo
+## %! t=0:0.01:2*pi; x = sin (t);
+## %! plot (t,x)
+## %! %-------------------------------------------------
+## %! % the figure window shows one cycle of a sine wave
 ## @end group
 ## @end example
 ##
@@ -52,7 +52,7 @@
 ## with the code
 ##
 ## @example
-##    %! input("Press <enter> to continue: ","s");
+## %! input("Press <enter> to continue: ","s");
 ## @end example
 ##
 ## @noindent
@@ -71,12 +71,12 @@
 ##
 ## @example
 ## @group
-##   %!demo if 1
-##   %!  function y=f(x)
-##   %!    y=x;
-##   %!  endfunction
-##   %!  f(3)
-##   %! endif
+## %!demo if 1
+## %!  function y=f(x)
+## %!    y=x;
+## %!  endfunction
+## %!  f(3)
+## %! endif
 ## @end group
 ## @end example
 ##