tests: use readlink.py instead of readlink

The latter doesn't always exist, such as on Solaris-derived platforms.

Differential Revision: https://phab.mercurial-scm.org/D998

tests/test-pathconflicts-merge.t

@@ -1,128 +1,128 b''
   $ hg init repo
   $ cd repo
   $ echo base > base
   $ hg add base
   $ hg commit -m "base"
   $ hg bookmark -i base
   $ mkdir a
   $ echo 1 > a/b
   $ hg add a/b
   $ hg commit -m "file"
   $ hg bookmark -i file
   $ echo 2 > a/b
   $ hg commit -m "file2"
   $ hg bookmark -i file2
   $ hg up 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkdir a
   $ ln -s c a/b
   $ hg add a/b
   $ hg commit -m "link"
   created new head
   $ hg bookmark -i link
   $ hg up 0
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ mkdir -p a/b/c
   $ echo 2 > a/b/c/d
   $ hg add a/b/c/d
   $ hg commit -m "dir"
   created new head
   $ hg bookmark -i dir
 
 Merge - local file conflicts with remote directory
 
   $ hg up file
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark file)
   $ hg bookmark -i
   $ hg merge --verbose dir
   resolving manifests
   a/b: path conflict - a file or link has the same name as a directory
   the local file has been renamed to a/b~0ed027b96f31
   resolve manually then use 'hg resolve --mark a/b'
   moving a/b to a/b~0ed027b96f31 (glob)
   getting a/b/c/d
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ hg status
   M a/b/c/d
   A a/b~0ed027b96f31
   R a/b
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg forget a/b~0ed027b96f31 && rm a/b~0ed027b96f31
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge file and dir (deleted file)"
 
 Merge - local symlink conflicts with remote directory
 
   $ hg up link
   1 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark link)
   $ hg bookmark -i
   $ hg merge dir
   a/b: path conflict - a file or link has the same name as a directory
   the local file has been renamed to a/b~2ea68033e3be
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ hg status
   M a/b/c/d
   A a/b~2ea68033e3be
   R a/b
   $ hg resolve --list
   P a/b
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg mv a/b~2ea68033e3be a/b.old
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg resolve --list
   R a/b
   $ hg commit -m "merge link and dir (renamed link)"
 
 Merge - local directory conflicts with remote file or link
 
   $ hg up dir
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (activating bookmark dir)
   $ hg bookmark -i
   $ hg merge file
   a/b: path conflict - a file or link has the same name as a directory
   the remote file has been renamed to a/b~0ed027b96f31
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ hg status
   A a/b~0ed027b96f31
   $ hg resolve --all
   a/b: path conflict must be resolved manually
   $ hg mv a/b~0ed027b96f31 a/b/old-b
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge dir and file (move file into dir)"
   created new head
   $ hg merge file2
   merging a/b/old-b and a/b to a/b/old-b
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ cat a/b/old-b
   2
   $ hg commit -m "merge file2 (copytrace tracked rename)"
   $ hg merge link
   a/b: path conflict - a file or link has the same name as a directory
   the remote file has been renamed to a/b~2ea68033e3be
   resolve manually then use 'hg resolve --mark a/b'
   1 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
   [1]
   $ hg mv a/b~2ea68033e3be a/b.old
-  $ readlink a/b.old
-  c
+  $ readlink.py a/b.old
+  a/b.old -> c
   $ hg resolve --mark a/b
   (no more unresolved files)
   $ hg commit -m "merge link (rename link)"