Example for vspan and hspan

src/examples.jl

@@ -1264,6 +1264,21 @@ const _examples = PlotExample[
             ),
         ],
     ),
+    PlotExample( # 57
+        "Vertical and horizonal spans",
+        """
+        `vspan` and `hspan` can be used to shade horizontal and vertical ranges.
+        """,
+        [
+            :(
+                begin
+                    hspan([1, 2, 3, 4]; label="hspan", legend=:topleft)
+                    vspan!([2, 3]; alpha=0.5, label="vspan")
+                    plot!([0, 2, 3, 5], [-1, 3, 2, 6]; c=:black, lw=2, label="line")
+                end
+            )
+        ]
+    ),
 ]
 
 # Some constants for PlotDocs and PlotReferenceImages