adjust grid_subplot_types mock

Author: archmoj

test/image/baselines/grid_subplot_types.png

@@ -17,7 +17,7 @@
       "yanchor": "bottom",
       "y": 0,
       "len": 0.3,
-      "labelalias": {"2": "TWO<sup>2</sup>"}
+      "labelalias": {"3": "2+1", "4": "2<sup>2</sup>"}
     }}
   ],
   "layout": {
@@ -28,7 +28,7 @@
     "xaxis3": {"title": {"text": "x3"}, "labelalias": {"0": "ZERO<sup>2</sup>"}},
     "yaxis3": {"title": {"text": "y3"}, "labelalias": {"0": "ZERO<sup>2</sup>"}},
     "grid": {"rows": 3, "columns": 3, "xgap": 0.3, "ygap": 0.3},
-    "scene": {"domain": {"row": 1, "column": 1}, "zaxis": {"labelalias": {"2": "TWO<sup>2</sup>"}}},
+    "scene": {"domain": {"row": 1, "column": 1}, "zaxis": {"labelalias": {"1.5": "1+½", "2": "√4", "2.5": "5/<sub>2</sub>"}}},
     "ternary": {"domain": {"row": 1, "column": 2}, "caxis": {"labelalias": {"1": "ONE"}}},
     "geo": {"domain": {"row": 2, "column": 1}},
     "width": 700,