Minor fixes

Signed-off-by: Natalie Arellano <[email protected]>

Author: Natalie Arellano

content/docs/extension-author-guide/create-extension/_index.md

@@ -1,7 +1,7 @@
 +++
 title="Create an extension"
 weight=4
-summary="This is a step-by-step tutorial for creating a CNB Image Extension for `curl`."
+summary="This is a step-by-step tutorial for creating and using CNB image extensions"
 +++
 
 <!--+if false+-->
@@ -15,7 +15,7 @@ Before we get started, make sure you've got the following installed:
 ## Overview
 <!--+end+-->
 
-This is a step-by-step tutorial for creating a CNB Image Extension for `curl`.
+This is a step-by-step tutorial for creating and using CNB image extensions.
 
 - [Set up your local environment](/docs/extension-author-guide/create-extension/setup-local-environment)
 - [See a build that requires base image extension in order to succeed](/docs/extension-author-guide/create-extension/why-dockerfiles)

content/docs/extension-author-guide/create-extension/build-dockerfile.md

@@ -68,7 +68,7 @@ You should see:
 ERROR: failed to launch: path lookup: exec: "curl": executable file not found in $PATH
 ```
 
-What happened: our builder uses run image `cnbs/sample-stack-run:alpine` which does not have `curl` installed, so our
+What happened: our builder uses run image `cnbs/sample-stack-run:alpine`, which does not have `curl` installed, so our
   process failed to launch.
 
 Let's take a look at how the `samples/curl` extension fixes the error by switching the run image to another image...

content/docs/extension-author-guide/create-extension/run-dockerfile.md

@@ -92,17 +92,20 @@ curl 7.85.0-DEV (x86_64-pc-linux-musl)
 What happened: now that `hello-extensions` requires both `tree` and `curl` in its build plan, both extensions are
   included in the build and provide the needed dependencies for build and launch, respectively
 * The `tree` extension installs `tree` at build time, as before
-* The `curl` extension switches the run image to `run-image-curl`, which has `curl` installed. Now our `curl` process
-    can succeed!
+* The `curl` extension switches the run image to `run-image-curl`, which has `curl` installed
+
+Now our `curl` process can succeed!
 
 ## What's next?
 
 The `tree` and `curl` examples are very simple, but we can unlock powerful new features with this functionality.
+
 Platforms could have several run images available, each tailored to a specific language family, thus limiting the number
 of installed dependencies for each image to the minimum necessary to support the targeted language. Image extensions
-could be used to switch the run image to that most appropriate for the current application. Similarly, builder images
-could be kept lean if image extensions are used to dynamically install the needed dependencies depending on the
-requirements of each application.
+could be used to switch the run image to that most appropriate for the current application.
+
+Similarly, builder images could be kept lean if image extensions are used to dynamically install the needed dependencies
+for each application.
 
 In the future, both run image switching and run image modification will be supported, opening the door to other use
 cases. Consult the [RFC](https://github.com/buildpacks/rfcs/pull/173) for further information.