test-obsolete-bundle-strip: check all changesets in the isolated prune case

We also want to check the result of the various computations when both
changesets are selected (the pruned changesets and its parents).

tests/test-obsolete-bundle-strip.t

@@ -1030,3 +1030,24 b' Actual testing'
   # unbundling: adding file changes
   # unbundling: added 1 changesets with 1 changes to 1 files
   # unbundling: (run 'hg update' to get a working copy)
+  $ testrevs 'desc("C-")'
+  ### Matched revisions###
+  9ac430e15fca: C-A
+  cefb651fc2fd: C-B
+  ### Relevant markers ###
+      cefb651fc2fdc7bb75e588781de5e432c134e8a5 0 {9ac430e15fca923b0ba027ca85d4d75c5c9cb73c} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  # bundling: 2 changesets found
+  ### Bundled markers ###
+      cefb651fc2fdc7bb75e588781de5e432c134e8a5 0 {9ac430e15fca923b0ba027ca85d4d75c5c9cb73c} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  ### diff <relevant> <bundled> ###
+  #################################
+  # stripping: saved backup bundle to $TESTTMP/lonely-prune/.hg/strip-backup/9ac430e15fca-b9855b02-backup.hg
+  ### Backup markers ###
+      cefb651fc2fdc7bb75e588781de5e432c134e8a5 0 {9ac430e15fca923b0ba027ca85d4d75c5c9cb73c} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
+  ### diff <relevant> <backed-up> ###
+  #################################
+  # unbundling: adding changesets
+  # unbundling: adding manifests
+  # unbundling: adding file changes
+  # unbundling: added 2 changesets with 2 changes to 2 files
+  # unbundling: (run 'hg update' to get a working copy)