docs: improve prune examples

docs/usage.rst

@@ -423,8 +423,8 @@ you restrict its operation to a subset of the archives using ``--prefix``.
 When using ``--prefix``, be careful to choose a good prefix - e.g. do not use a
 prefix "foo" if you do not also want to match "foobar".
 
-It is strongly recommended to always run ``prune --dry-run ...`` first so you
-will see what it would do without it actually doing anything.
+It is strongly recommended to always run ``prune -v --list --dry-run ...``
+first so you will see what it would do without it actually doing anything.
 
 There is also a visualized prune example in ``docs/misc/prune-example.txt``.
 
@@ -432,19 +432,19 @@ There is also a visualized prune example in ``docs/misc/prune-example.txt``.
 
     # Keep 7 end of day and 4 additional end of week archives.
     # Do a dry-run without actually deleting anything.
-    $ borg prune --dry-run --keep-daily=7 --keep-weekly=4 /path/to/repo
+    $ borg prune -v --list --dry-run --keep-daily=7 --keep-weekly=4 /path/to/repo
 
     # Same as above but only apply to archive names starting with the hostname
     # of the machine followed by a "-" character:
-    $ borg prune --keep-daily=7 --keep-weekly=4 --prefix='{hostname}-' /path/to/repo
+    $ borg prune -v --list --keep-daily=7 --keep-weekly=4 --prefix='{hostname}-' /path/to/repo
 
     # Keep 7 end of day, 4 additional end of week archives,
     # and an end of month archive for every month:
-    $ borg prune --keep-daily=7 --keep-weekly=4 --keep-monthly=-1 /path/to/repo
+    $ borg prune -v --list --keep-daily=7 --keep-weekly=4 --keep-monthly=-1 /path/to/repo
 
     # Keep all backups in the last 10 days, 4 additional end of week archives,
     # and an end of month archive for every month:
-    $ borg prune --keep-within=10d --keep-weekly=4 --keep-monthly=-1 /path/to/repo
+    $ borg prune -v --list --keep-within=10d --keep-weekly=4 --keep-monthly=-1 /path/to/repo
 
 
 .. include:: usage/info.rst.inc