doc: update dseries/reporting doc for change related to 6733c83f

doc/dseries-and-reporting/dseriesReporting.tex

@@ -896,8 +896,8 @@ r = report();
 @#  for var in endovars
       r = r.addGraph(`data', shock@{shock}.@{var}, `title', `@{var}', ...
                      `showGrid', false, `yTickLabelPrecision', 2, ...
-                     `yTickLabelZeroFill', false);
-      r = r.addSeries(`graphHline', 0, `graphLineColor', `red');
+                     `yTickLabelZeroFill', false, ...
+                     `showZeroLine', true, `zeroLineColor', 'red');
 @#  endfor
     r = r.addVspace(`number', 2);
     r = r.addSection(`cols', 1);