fix: extension embedding example

docs/extensions/_formats-common.qmd

@@ -56,12 +56,29 @@ contributes:
 
 In some cases format extensions will want to make use of other extensions. This is permitted, but adding extensions for use within a custom format must be done with a special command line flag to ensure they are embedded correctly.
 
+``` {.bash filename="Terminal"}
+quarto create extension format:pdf myformat
+quarto add quarto-ext/fancy-text --embed myformat
+```
+
 For example, here we want to make the [fancy-text](https://github.com/quarto-ext/fancy-text) extension (which provides special formatting for the words {{< latex >}} and {{< bibtex >}}) available for users of the [jss](https://github.com/quarto-journals/jss) custom format:
 
 ``` {.bash filename="Terminal"}
-quarto add quarto-ext/fancy-text --embed quarto-journals/jss
+quarto add quarto-ext/fancy-text --embed jss
+```
+
+This will produce the following output:
+
+``` {.bash filename="Output"}
+quarto-journals/jss
+└── _extensions
+    └── jss
+        ├── _extensions
+        │   └── quarto-ext
+        │       └── fancy-text
+        └── partials
 ```
 
-This will add the `quarto-ext/fancy-text` extension into the `quarto-journals/jss` extension in the `_extensions` folder. By embedding an extension you make it available without creating the potential for conflict with other versions of the extension that uses might already have installed.
+This will add the `quarto-ext/fancy-text` extension into the `jss` extension in the `_extensions` folder. By embedding an extension you make it available without creating the potential for conflict with other versions of the extension that uses might already have installed.
 
 [^_formats-common-1]: This is most common in the the case of PDF based formats which have a secondary step of converting the LaTeX produced by Pandoc into a PDF. If there are files that are referenced indirectly by the LaTeX, they will need to be discoverable and should typically be copied into the same directory that contains the LaTeX input.