push: hide description about "-f" in the hint to prevent from using it easily

"use push -f to force" in the hint at abortion of "hg push" may cause
novice users to execute "push -f" easily without understanding about
problems of multiple branch heads in the repository.

This patch hides description about "-f" in the hint, and leads into
seeing "hg help push" for details about pushing new heads.

mercurial/discovery.py

@@ -330,11 +330,13 def checkheads(repo, remote, outgoing, r
                     error = _("push creates new remote head %s!"
                               ) % short(dhs[0])
                 if heads[2]: # unsynced
-                    hint = _("you should pull and merge or "
-                             "use push -f to force")
+                    hint = _("pull and merge or"
+                             " see \"hg help push\" for details about"
+                             " pushing new heads")
                 else:
-                    hint = _("did you forget to merge? "
-                             "use push -f to force")
+                    hint = _("merge or"
+                             " see \"hg help push\" for details about"
+                             " pushing new heads")
             if branch is not None:
                 repo.ui.note(_("new remote heads on branch '%s'\n") % branch)
             for h in dhs:

tests/test-bookmarks-pushpull.t

@@ -275,7 +275,7 diverging a remote bookmark fails
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: push creates new remote head c922c0139ca0!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg -R ../a book
      @                         1:0d2164f0ce0d
@@ -291,7 +291,7 Unrelated marker does not alter the deci
   pushing to http://localhost:$HGPORT2/
   searching for changes
   abort: push creates new remote head c922c0139ca0!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg -R ../a book
      @                         1:0d2164f0ce0d

tests/test-obsolete-checkheads.t

@@ -98,7 +98,7 Abort: old will still be an head because
   pushing to $TESTTMP/remote (glob)
   searching for changes
   abort: push creates new remote head 71e3228bffe1!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
 old head is now public (public remote version)
@@ -127,7 +127,7 TODO: Not implemented yet.
 #   pushing to $TESTTMP/remote
 #   searching for changes
 #   abort: push creates new remote head 71e3228bffe1!
-#   (did you forget to merge? use push -f to force)
+#   (merge or see "hg help push" for details about pushing new heads)
 #   [255]
 
 old head is obsolete but replacement is not pushed
@@ -158,7 +158,7 Push should abort on new head
   pushing to $TESTTMP/remote (glob)
   searching for changes
   abort: push creates new remote head d7d41ccbd4de!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
 

tests/test-phases-exchange.t

@@ -844,7 +844,7 appear on the remote side.
   pushing to ../mu
   searching for changes
   abort: push creates new remote head 435b5d83910c!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg push -fr 435b5d83910c ../mu # because the push will create new visible head
   pushing to ../mu

tests/test-push-warn.t

@@ -26,7 +26,7
   pushing to ../a
   searching for changes
   abort: push creates new remote head 1e108cc5548c!
-  (you should pull and merge or use push -f to force)
+  (pull and merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg push --debug ../a
@@ -41,7 +41,7
   new remote heads on branch 'default'
   new remote head 1e108cc5548c
   abort: push creates new remote head 1e108cc5548c!
-  (you should pull and merge or use push -f to force)
+  (pull and merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg pull ../a
@@ -57,7 +57,7
   pushing to ../a
   searching for changes
   abort: push creates new remote head 1e108cc5548c!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg merge
@@ -110,7 +110,7
   pushing to ../c
   searching for changes
   abort: push creates new remote head 6346d66eb9f5!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg push -r 2 ../c
@@ -123,7 +123,7
   pushing to ../c
   searching for changes
   abort: push creates new remote head a5dda829a167!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg push -v -r 3 -r 4 ../c
@@ -133,7 +133,7
   new remote head a5dda829a167
   new remote head ee8fbc7a0295
   abort: push creates new remote head a5dda829a167!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg push -v -f -r 3 -r 4 ../c
@@ -263,7 +263,7 Fail on multiple head push:
   pushing to ../f
   searching for changes
   abort: push creates new remote head 0b715ef6ff8f on branch 'a'!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
 Push replacement head on existing branches:
@@ -409,7 +409,7 multiple new heads:
   pushing to h
   searching for changes
   abort: push creates new remote head 97bd0c84d346!
-  (you should pull and merge or use push -f to force)
+  (pull and merge or see "hg help push" for details about pushing new heads)
   [255]
 
 
@@ -481,7 +481,7 Prepush -r should not allow you to sneak
   pushing to ../l
   searching for changes
   abort: push creates new remote head 451211cc22b0 on branch 'a'!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ cd ..
@@ -736,14 +736,14 outgoing:
   pushing to inner
   searching for changes
   abort: push creates new remote head 7d0f4fb6cf04 on branch 'A'!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg push inner -r4 -r5
   pushing to inner
   searching for changes
   abort: push creates new remote head 7d0f4fb6cf04 on branch 'A'!
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
 
   $ hg in inner

tests/test-subrepo.t

@@ -317,7 +317,7 push -f
   pushing subrepo s to $TESTTMP/t/s
   searching for changes
   abort: push creates new remote head 12a213df6fa9! (in subrepo s)
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg push -f
   pushing to $TESTTMP/t (glob)
@@ -716,7 +716,7 Issue1977: multirepo push should fail if
   $ hg -R repo2 ci -m3
   $ hg -q -R repo2 push
   abort: push creates new remote head cc505f09a8b2! (in subrepo s)
-  (did you forget to merge? use push -f to force)
+  (merge or see "hg help push" for details about pushing new heads)
   [255]
   $ hg -R repo update
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved