fixup! Simplify caching example in author guide

Signed-off-by: Aidan Delaney <[email protected]>

content/docs/buildpack-author-guide/create-buildpack/adding-bill-of-materials.md

@@ -15,14 +15,11 @@ One of the benefits of buildpacks is they can also populate the app image with m
 
 You can find some of this information using `pack` via its `inspect-image` command.  The bill-of-materials information will be available using `pack sbom download`.
 
-<!-- test:exec -->
 ```bash
 pack inspect-image test-node-js-app
 ```
-<!--+- "{{execute}}"+-->
 You should see the following:
 
-<!-- test:assert=contains;ignore-lines=... -->
 ```text
 Run Images:
   cnbs/sample-base-run:jammy

content/docs/buildpack-author-guide/create-buildpack/caching.md

@@ -128,11 +128,12 @@ default = true
 EOL
 ```
 
-Now when you build your app:
+Now when you build your app, the second call will reuse the layer:
 
 <!-- test:exec -->
 ```text
 pack build test-node-js-app --path ./node-js-sample-app --buildpack ./node-js-buildpack
+pack build test-node-js-app --path ./node-js-sample-app --buildpack ./node-js-buildpack
 ```
 <!--+- "{{execute}}"+-->
 
@@ -143,7 +144,7 @@ you will see the new caching logic at work during the `BUILDING` phase:
 ===> BUILDING
 ...
 ---> NodeJS Buildpack
----> Reusing NodeJS
+-----> Reusing NodeJS
 ```
 
 Next, let's see how buildpack users may be able to provide configuration to the buildpack.

content/docs/buildpack-author-guide/create-buildpack/make-buildpack-configurable.md

@@ -62,7 +62,7 @@ node_js_version=$(cat "$plan" | yj -t | jq -r '.entries[] | select(.name == "nod
 node_js_url=https://nodejs.org/dist/v${node_js_version}/node-v${node_js_version}-linux-x64.tar.xz
 remote_nodejs_version=$(cat "${layersdir}/node-js.toml" 2> /dev/null | yj -t | jq -r .metadata.nodejs_version 2>/dev/null || echo 'NOT FOUND')
 if [[ "${node_js_url}" != *"${remote_nodejs_version}"* ]] ; then
-    echo "-----> Downloading and extracting NodeJS"
+    echo "-----> Downloading and extracting NodeJS" ${node_js_version}
     wget -q -O - "${node_js_url}" | tar -xJf - --strip-components 1 -C "${node_js_layer}"
 else
     echo "-----> Reusing NodeJS"
@@ -94,11 +94,11 @@ Finally, create a file `node-js-sample-app/.node-js-version` with the following
 18.18.1
 ```
 
-Now when you run:
+In the following `pack` invocation we choose to `--clear-cache` so that we explicitly do not re-use cached layers.  This helps us demonstrate that the NodeJS runtime layer does not get restored from a cache.
 
 <!-- test:exec -->
 ```bash
-pack build test-node-js-app --path ./node-js-sample-app --buildpack ./node-js-buildpack
+pack build test-node-js-app --clear-cache --path ./node-js-sample-app --buildpack ./node-js-buildpack
 ```
 <!--+- "{{execute}}"+-->
 
@@ -109,7 +109,7 @@ You will notice that version of NodeJS specified in the app's `.node-js-version`
 ===> BUILDING
 ...
 ---> NodeJS Buildpack
----> Downloading and extracting NodeJS 18.18.1
+-----> Downloading and extracting NodeJS 18.18.1
 ```
 
 Next, let's see how buildpacks can store information about the dependencies provided in the output app image for introspection.