include underscore after view (#3030)

mattijn · web-flow · commit 6d6f96e1a78f · 2023-04-23T20:59:48.000+02:00
diff --git a/altair/vegalite/v5/api.py b/altair/vegalite/v5/api.py
@@ -3310,7 +3310,7 @@ def _extend_view_name(v, r):
     if v.endswith("child__" + r):
         return v
     else:
-        return v + "child__" + r
+        return f"{v}_child__{r}"
 
 
 def _repeat_names(params, repeat):
