$ cat >> $HGRCPATH <<EOF
  > [ui]
  > logtemplate = {rev}:{node|short} {desc}\n
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext/evolve.py" >> $HGRCPATH
  $ echo "inhibit=$(echo $(dirname $TESTDIR))/hgext/inhibit.py" >> $HGRCPATH
  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

  $ hg init inhibit
  $ cd inhibit
  $ mkcommit cA
  $ mkcommit cB
  $ mkcommit cC
  $ mkcommit cD
  $ hg up 'desc(cA)'
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ mkcommit cE
  created new head
  $ mkcommit cG
  $ mkcommit cH
  $ mkcommit cJ
  $ hg log -G 
  @  7:18214586bf78 add cJ
  |
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  | o  3:2db36d8066ff add cD
  | |
  | o  2:7df62a38b9bf add cC
  | |
  | o  1:02bcbc3f6e56 add cB
  |/
  o  0:54ccbc537fc2 add cA
  

plain prune

  $ hg prune 1::
  3 changesets pruned
  $ hg log -G
  @  7:18214586bf78 add cJ
  |
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA
  
  $ hg debugobsinhibit --hidden 1::
  $ hg log -G
  @  7:18214586bf78 add cJ
  |
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  | o  3:2db36d8066ff add cD
  | |
  | o  2:7df62a38b9bf add cC
  | |
  | o  1:02bcbc3f6e56 add cB
  |/
  o  0:54ccbc537fc2 add cA
  
  $ hg prune --hidden 1::
  3 changesets pruned
  $ hg log -G
  @  7:18214586bf78 add cJ
  |
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA
  

after amend

  $ echo babar > cJ
  $ hg amend
  $ hg log -G
  @  9:55c73a90e4b4 add cJ
  |
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA
  
  $ hg debugobsinhibit --hidden 18214586bf78
  $ hg log -G
  @  9:55c73a90e4b4 add cJ
  |
  | o  7:18214586bf78 add cJ
  |/
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA
  

and no divergence

  $ hg summary
  parent: 9:55c73a90e4b4 tip
   add cJ
  branch: default
  commit: (clean)
  update: 1 new changesets, 2 branch heads (merge)

check public revision got cleared
(when adding the second inhibitor, the first one is removed because it is public)

  $ wc -m .hg/store/obsinhibit
  20 .hg/store/obsinhibit
  $ hg prune 7
  1 changesets pruned
  $ hg debugobsinhibit --hidden 18214586bf78
  $ wc -m .hg/store/obsinhibit
  20 .hg/store/obsinhibit
  $ hg log -G
  @  9:55c73a90e4b4 add cJ
  |
  | o  7:18214586bf78 add cJ
  |/
  o  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA
  
  $ hg phase --public 7
  $ hg prune 9
  1 changesets pruned
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  working directory now at cf5c4f4554ce
  $ hg debugobsinhibit --hidden 55c73a90e4b4
  $ wc -m .hg/store/obsinhibit
  20 .hg/store/obsinhibit
  $ hg log -G
  o  9:55c73a90e4b4 add cJ
  |
  | o  7:18214586bf78 add cJ
  |/
  @  6:cf5c4f4554ce add cH
  |
  o  5:5419eb264a33 add cG
  |
  o  4:98065434e5c6 add cE
  |
  o  0:54ccbc537fc2 add cA