fix: Docs review comments

Author: tmathern

examples/README.md

@@ -8,7 +8,7 @@ The examples use asset files from the `tests/fixtures` directory, save the resul
 The [`examples/sign.py`](https://github.com/contentauth/c2pa-python/blob/main/examples/sign.py) script shows how to sign an asset with a C2PA manifest and verify the asset.
 
 
-The `examples/sign.py` script shows how to sign an asset with a C2PA manifest and verify it using a callback signer. Callback signers let you define signing logic, eg. where to load keys from.
+The `examples/sign.py` script shows how to sign an asset with a C2PA manifest and verify it using a callback signer. Callback signers let you define signing logic, for example where to load keys from.
 
 The `examples/sign_info.py` script shows how to sign an asset with a C2PA manifest and verify it using a "default" signer created with the needed signer information.
 These statements create a `builder` object with the specified manifest JSON (omitted in the snippet below), call `builder.sign()` to sign and attach the manifest to the source file, `tests/fixtures/C.jpg`, and save the signed asset to the output file, `output/C_signed.jpg`:
@@ -82,15 +82,15 @@ python examples/training.py
 
 ### Run the signing and verification example
 
-In this example, signing is done with a Signer created using SignerInfo:
+In this example, `SignerInfo` creates a `Signer` object that signs the manifest.
 
 ```bash
 python examples/sign_info.py
 ```
 
 ### Run the callback signing and verification example
 
-In this example, signing is done using a callback signer:
+In this example, a callback signer is the signer:
 
 ```bash
 python examples/sign.py

examples/sign_info.py

@@ -10,6 +10,12 @@
 # specific language governing permissions and limitations under
 # each license.
 
+###############################################################
+# This example shows an "older" way of signing,
+# and is left here as reference.
+# Please refer to sign.py for the recommended implementation.
+###############################################################
+
 # This example shows how to sign an image with a C2PA manifest
 # and read the metadata added to the image.