Exclude throw cell until it can be executed

Author: mcbarton

notebooks/xeus-cpp.ipynb

@@ -114,6 +114,10 @@
    "execution_count": 4,
    "id": "945b7054-ed4d-4270-ae9f-c7696392a5d3",
    "metadata": {
+    "slideshow": {
+     "slide_type": ""
+    },
+    "tags": ["--tag-exclude-regex'"],
     "vscode": {
      "languageId": "c++"
     }