rebase: stress that only local changesets should be rebased

hgext/rebase.py

@@ -29,9 +29,14 b' def rebase(ui, repo, **opts):'
 
     Rebase uses repeated merging to graft changesets from one part of
     history (the source) onto another (the destination). This can be
-    useful for linearizing local changes relative to a master
+    useful for linearizing *local* changes relative to a master
     development tree.
 
+    You should not rebase changesets that have already been shared
+    with others. Doing so will force everybody else to perform the
+    same rebase or they will end up with duplicated changesets after
+    pulling in your rebased changesets.
+
     If you don't specify a destination changeset (``-d/--dest``),
     rebase uses the tipmost head of the current named branch as the
     destination. (The destination changeset is not modified by

tests/test-rebase-parameters.out

@@ -9,7 +9,12 b' move changeset (and descendants) to a di'
 
     Rebase uses repeated merging to graft changesets from one part of history
     (the source) onto another (the destination). This can be useful for
-    linearizing local changes relative to a master development tree.
+    linearizing *local* changes relative to a master development tree.
+
+    You should not rebase changesets that have already been shared with
+    others. Doing so will force everybody else to perform the same rebase or
+    they will end up with duplicated changesets after pulling in your rebased
+    changesets.
 
     If you don't specify a destination changeset ("-d/--dest"), rebase uses
     the tipmost head of the current named branch as the destination. (The
@@ -68,7 +73,12 b' move changeset (and descendants) to a di'
 
     Rebase uses repeated merging to graft changesets from one part of history
     (the source) onto another (the destination). This can be useful for
-    linearizing local changes relative to a master development tree.
+    linearizing *local* changes relative to a master development tree.
+
+    You should not rebase changesets that have already been shared with
+    others. Doing so will force everybody else to perform the same rebase or
+    they will end up with duplicated changesets after pulling in your rebased
+    changesets.
 
     If you don't specify a destination changeset ("-d/--dest"), rebase uses
     the tipmost head of the current named branch as the destination. (The
@@ -127,7 +137,12 b' move changeset (and descendants) to a di'
 
     Rebase uses repeated merging to graft changesets from one part of history
     (the source) onto another (the destination). This can be useful for
-    linearizing local changes relative to a master development tree.
+    linearizing *local* changes relative to a master development tree.
+
+    You should not rebase changesets that have already been shared with
+    others. Doing so will force everybody else to perform the same rebase or
+    they will end up with duplicated changesets after pulling in your rebased
+    changesets.
 
     If you don't specify a destination changeset ("-d/--dest"), rebase uses
     the tipmost head of the current named branch as the destination. (The
@@ -186,7 +201,12 b' move changeset (and descendants) to a di'
 
     Rebase uses repeated merging to graft changesets from one part of history
     (the source) onto another (the destination). This can be useful for
-    linearizing local changes relative to a master development tree.
+    linearizing *local* changes relative to a master development tree.
+
+    You should not rebase changesets that have already been shared with
+    others. Doing so will force everybody else to perform the same rebase or
+    they will end up with duplicated changesets after pulling in your rebased
+    changesets.
 
     If you don't specify a destination changeset ("-d/--dest"), rebase uses
     the tipmost head of the current named branch as the destination. (The