Show the destionation for clone if not specified manually.

mercurial/hg.py

@@ -103,6 +103,7 b' def clone(ui, source, dest=None, pull=Fa'
 
     if dest is None:
         dest = defaultdest(source)
+        ui.status(_("destination directory: %s\n") % dest)
 
     def localpath(path):
         if path.startswith('file://'):

tests/test-clone-failure.out

@@ -8,4 +8,5 b" abort: destination '../a' already exists"
 255
 abort: repository a not found!
 255
+destination directory: q
 abort: destination 'q' already exists

tests/test-clone.out

@@ -11,5 +11,6 b' checking manifests'
 crosschecking files in changesets and manifests
 checking files
 1 files, 1 changesets, 1 total revisions
+destination directory: a
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 a