pull: do not prompt "hg update" if update.requiredest is set

Previously, after pull, we show:

  (run 'hg update' to get a working copy)

unconditionally. People might run `hg update` and get an exception if
`update.requiredest` is set, and get a bit frustrated. This patch changes
the code to not prompt `hg update` in that case.

Differential Revision: https://phab.mercurial-scm.org/D516

mercurial/commands.py

@@ -3849,7 +3849,7 b' def postincoming(ui, repo, modheads, opt'
                         "merge)\n"))
         else:
             ui.status(_("(run 'hg heads' to see heads)\n"))
-    else:
+    elif not ui.configbool('commands', 'update.requiredest'):
         ui.status(_("(run 'hg update' to get a working copy)\n"))
 
 @command('^pull',

tests/test-update-dest.t

@@ -33,3 +33,16 b' Check update.requiredest interaction wit'
   abort: update destination required by configuration
   (use hg pull followed by hg update DEST)
   [255]
+
+  $ cd ..
+
+update.requiredest should silent the "hg update" text after pull
+  $ hg init repo1
+  $ cd repo1
+  $ hg pull ../repo
+  pulling from ../repo
+  requesting all changes
+  adding changesets
+  adding manifests
+  adding file changes
+  added 2 changesets with 2 changes to 1 files