Fix up example description of podman-manifest commands

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Author: rhatdan

docs/source/markdown/podman-manifest-add.1.md.in

@@ -90,16 +90,19 @@ configuration information.
 
 ## EXAMPLE
 
+Add specified default image from source manifest list to destination manifest list:
 ```
 podman manifest add mylist:v1.11 docker://fedora
 71c201d10fffdcac52968a000d85a0a016ca1c7d5473948000d3131c1773d965
 ```
 
+Add all images from source manfest list to destination manifest list:
 ```
 podman manifest add --all mylist:v1.11 docker://fedora
 71c201d10fffdcac52968a000d85a0a016ca1c7d5473948000d3131c1773d965
 ```
 
+Add selected image matching arch and variant from source manifest list to destination manifest list:
 ```
 podman manifest add --arch arm64 --variant v8 mylist:v1.11 docker://71c201d10fffdcac52968a000d85a0a016ca1c7d5473948000d3131c1773d965
 ```

docs/source/markdown/podman-manifest-annotate.1.md.in

@@ -40,6 +40,7 @@ for the image.  This option is rarely used.
 
 ## EXAMPLE
 
+Update arch and variant information to specified manifest list for image:
 ```
 podman manifest annotate --arch arm64 --variant v8 mylist:v1.11 sha256:59eec8837a4d942cc19a52b8c09ea75121acc38114a2c68b98983ce9356b8610
 07ec8dc22b5dba3a33c60b68bce28bbd2b905e383fdb32a90708fa5eeac13a07: sha256:59eec8837a4d942cc19a52b8c09ea75121acc38114a2c68b98983ce9356b8610

docs/source/markdown/podman-manifest-exists.1.md

@@ -21,20 +21,18 @@ Print usage statement.
 
 ## EXAMPLE
 
-Check if a manifest list called `list1` exists (the manifest list does actually exist).
+Check if a manifest list called `list1` exists (the manifest list does actually exist):
 ```
 $ podman manifest exists list1
 $ echo $?
 0
-$
 ```
 
-Check if a manifest called `mylist` exists (the manifest list does not actually exist).
+Check if a manifest called `mylist` exists (the manifest list does not actually exist):
 ```
 $ podman manifest exists mylist
 $ echo $?
 1
-$
 ```
 
 ## SEE ALSO

docs/source/markdown/podman-manifest-push.1.md.in

@@ -83,6 +83,7 @@ Sign the pushed images with a sigstore signature using a private key at the spec
 
 ## EXAMPLE
 
+Push manifest list to container registry:
 ```
 podman manifest push mylist:v1.11 docker://registry.example.org/mylist:v1.11
 ```

docs/source/markdown/podman-manifest-remove.1.md

@@ -14,6 +14,7 @@ The list image's ID and the digest of the removed image's manifest.
 
 ## EXAMPLE
 
+Remove specified digest from the manifest list:
 ```
 podman manifest remove mylist:v1.11 sha256:cb8a924afdf0229ef7515d9e5b3024e23b3eb03ddbba287f4a19c6ac90b8d221
 e604eabaaee4858232761b4fef84e2316ed8f93e15eceafce845966ee3400036 :sha256:cb8a924afdf0229ef7515d9e5b3024e23b3eb03ddbba287f4a19c6ac90b8d221