diff --git a/slide-notebooks/l8_2-doc.jl b/slide-notebooks/l8_2-doc.jl
index fb7638ac..9b697ed5 100644
--- a/slide-notebooks/l8_2-doc.jl
+++ b/slide-notebooks/l8_2-doc.jl
@@ -91,10 +91,10 @@ One can add examples to doc-strings (they can even be part of testing: [doc-test
 Transform polar to cartesian coordinates.
 
 ## Example
-````jldoctest
+```jldoctest
 julia> transform(4.5, pi/5)
 (3.6405764746872635, 2.6450336353161292)
-```` 
+```
 """
 transform(r, θ) = (r*cos(θ), r*sin(θ))
 
diff --git a/slide-notebooks/notebooks/l8_1-multi-xpu.ipynb b/slide-notebooks/notebooks/l8_1-multi-xpu.ipynb
index 5042eaff..0b906975 100644
--- a/slide-notebooks/notebooks/l8_1-multi-xpu.ipynb
+++ b/slide-notebooks/notebooks/l8_1-multi-xpu.ipynb
@@ -1104,11 +1104,11 @@
    "file_extension": ".jl",
    "mimetype": "application/julia",
    "name": "julia",
-   "version": "1.6.3"
+   "version": "1.7.2"
   },
   "kernelspec": {
-   "name": "julia-1.6",
-   "display_name": "Julia 1.6.3",
+   "name": "julia-1.7",
+   "display_name": "Julia 1.7.2",
    "language": "julia"
   }
  },
diff --git a/slide-notebooks/notebooks/l8_2-doc.ipynb b/slide-notebooks/notebooks/l8_2-doc.ipynb
index 99bff738..72a31506 100644
--- a/slide-notebooks/notebooks/l8_2-doc.ipynb
+++ b/slide-notebooks/notebooks/l8_2-doc.ipynb
@@ -148,10 +148,10 @@
     "Transform polar to cartesian coordinates.\n",
     "\n",
     "# Example\n",
-    "````jldoctest\n",
+    "```jldoctest\n",
     "julia> transform(4.5, pi/5)\n",
     "(3.6405764746872635, 2.6450336353161292)\n",
-    "````\n",
+    "```\n",
     "\"\"\"\n",
     "transform(r, θ) = (r*cos(θ), r*sin(θ))"
    ],
@@ -324,11 +324,11 @@
    "file_extension": ".jl",
    "mimetype": "application/julia",
    "name": "julia",
-   "version": "1.6.3"
+   "version": "1.7.2"
   },
   "kernelspec": {
-   "name": "julia-1.6",
-   "display_name": "Julia 1.6.3",
+   "name": "julia-1.7",
+   "display_name": "Julia 1.7.2",
    "language": "julia"
   }
  },
diff --git a/website/_literate/l8_2-doc_web.jl b/website/_literate/l8_2-doc_web.jl
index 5a1c3ed2..a99225f8 100644
--- a/website/_literate/l8_2-doc_web.jl
+++ b/website/_literate/l8_2-doc_web.jl
@@ -91,10 +91,10 @@ One can add examples to doc-strings (they can even be part of testing: [doc-test
 Transform polar to cartesian coordinates.
 
 ## Example
-````jldoctest
+```jldoctest
 julia> transform(4.5, pi/5)
 (3.6405764746872635, 2.6450336353161292)
-```` 
+```
 """
 transform(r, θ) = (r*cos(θ), r*sin(θ))