refine dangling checks

By proxy by vendoring containers/common. Previously, a "dangling" image
was an untagged image; just a described in the Docker docs. The
definition of dangling has now been refined to an untagged image without
children to be compatible with Docker.

Further update a redundant image-prune test.

Fixes: #10998
Fixes: #10832
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/source/markdown/podman-images.1.md b/docs/source/markdown/podman-images.1.md
index 23cce450a..02385daec 100644
--- a/docs/source/markdown/podman-images.1.md
+++ b/docs/source/markdown/podman-images.1.md
@@ -36,7 +36,7 @@ Filter output based on conditions provided
     Filter on images created before the given IMAGE (name or tag).
 
   **dangling=true|false**
-    Show dangling images. Dangling images are a file system layer that was used in a previous build of an image and is no longer referenced by any active images. They are denoted with the `<none>` tag, consume disk space and serve no active purpose.
+    Show dangling images. Dangling images are a file system layer that was used in a previous build of an image and is no longer referenced by any image. They are denoted with the `<none>` tag, consume disk space and serve no active purpose.
 
   **label**
     Filter by images labels key and/or value.