Merge pull request #56 from scipp/fix-param-table-docs

Remove outdated comment in docs

docs/user-guide/parameter-tables.ipynb

@@ -161,7 +161,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Nodes that depend on values from a parameter table are drawn as \"3D boxes\" with the parameter index name (the row dimension of the parameter table) and value given in parenthesis.\n",
+    "Nodes that depend on values from a parameter table are drawn with the parameter index name (the row dimension of the parameter table) and value given in parenthesis.\n",
     "The dashed arrow indicates and internal transformation that gathers result from each branch and combines them into a single output, here `Series[RunID, Result]`.\n",
     "\n",
     "<div class=\"alert alert-info\">\n",