improve contour label reversed axes mock

Author: etpinard

test/image/baselines/contour_label-reversed-axes.png

@@ -3,33 +3,48 @@
     {
       "type": "contour",
       "z": [
-        [1, 2, 1],
-        [2, 1, 2],
-        [2, 1, 2]
+        [1, 2, 3],
+        [2, 0, 0],
+        [3, 0, 3]
       ],
-      "contours": {"showlabels": true}
+      "contours": {"showlabels": true},
+      "showscale": false
     },
     {
       "type": "contour",
       "z": [
-        [1, 2, 1],
-        [2, 1, 2],
-        [2, 1, 2]
+        [1, 2, 3],
+        [2, 0, 0],
+        [3, 0, 3]
       ],
       "contours": {"showlabels": true},
+      "showscale": false,
       "xaxis": "x2",
       "yaxis": "y2"
     },
     {
       "type": "contour",
       "z": [
-        [1, 2, 1],
-        [2, 1, 2],
-        [2, 1, 2]
+        [1, 2, 3],
+        [2, 0, 0],
+        [3, 0, 3]
       ],
       "contours": {"showlabels": true},
+      "showscale": false,
       "xaxis": "x3",
       "yaxis": "y3"
+    },
+    {
+      "type": "contour",
+      "z": [
+        [1, 2, 3],
+        [2, 0, 0],
+        [3, 0, 3]
+      ],
+      "contours": {"showlabels": true},
+      "showscale": false,
+      "xaxis": "x4",
+      "yaxis": "y4"
     }
   ],
   "layout": {
@@ -40,6 +55,9 @@
 
     "xaxis2": {"autorange": "reversed"},
 
-    "yaxis3": {"autorange": "reversed"}
+    "yaxis3": {"autorange": "reversed"},
+
+    "xaxis4": {"range": [2.05, -0.05]},
+    "yaxis4": {"range": [2.2, -0.2]}
   }
 }