add with/without a Stat in gallery to highlight difference

docs/src/gallery/geometries.md

@@ -63,10 +63,10 @@ plot(dataset("lattice", "singer"), x="VoicePart", y="Height", Geom.boxplot)
 ## Geom.contour
 
 ```@example
-using Gadfly, RDatasets
+using Gadfly
 set_default_plot_size(14cm, 8cm)
 plot(z=(x,y) -> x*exp(-(x-round(Int, x))^2-y^2),
-     x=linspace(-8,8,150), y=linspace(-2,2,150), Geom.contour)
+     xmin=[-8], xmax=[8], ymin=[-2], ymax=[2], Geom.contour)
 ```
 
 ```@example

docs/src/gallery/scales.md

@@ -4,12 +4,13 @@
 
 ```@example
 using Gadfly
-set_default_plot_size(14cm, 8cm)
-srand(1234)
+set_default_plot_size(21cm, 8cm)
 # The data are all between 0 and 1, but the color scale goes from -1 to 1.
 # For example, you might do this to force a consistent color scale between plots.
-plot(x=rand(12), y=rand(12), color=rand(12),
-     Scale.color_continuous(minvalue=-1, maxvalue=1))
+xdata, ydata, cdata = rand(12), rand(12), rand(12)
+p1 = plot(x=xdata, y=ydata, color=cdata);
+p2 = plot(x=xdata, y=ydata, color=cdata, Scale.color_continuous(minvalue=-1, maxvalue=1));
+hstack(p1,p2)
 ```
 
 ```@example
@@ -109,11 +110,12 @@ hstack(pa,pb)
 
 ```@example
 using Gadfly
-set_default_plot_size(14cm, 8cm)
-xs = 1:10.
-ys = 1:10.
+set_default_plot_size(21cm, 8cm)
+xs = ys = 1:10.
 zs = Float64[x^2*log(y) for x in xs, y in ys]
-plot(x=xs, y=ys, z=zs, Geom.contour, Scale.color_none)
+p1 = plot(x=xs, y=ys, z=zs, Geom.contour);
+p2 = plot(x=xs, y=ys, z=zs, Geom.contour, Scale.color_none);
+hstack(p1,p2)
 ```
 
 

docs/src/gallery/statistics.md

@@ -4,9 +4,12 @@
 
 ```@example
 using Gadfly, RDatasets
-set_default_plot_size(14cm, 8cm)
-plot(dataset("datasets", "iris"), x="SepalLength", y="SepalWidth",
+set_default_plot_size(21cm, 8cm)
+p1 = plot(dataset("datasets", "iris"), x="SepalLength", y="SepalWidth",
+     Geom.point)
+p2 = plot(dataset("datasets", "iris"), x="SepalLength", y="SepalWidth",
      Stat.binmean, Geom.point)
+hstack(p1,p2)
 ```