view doc/README @ 33789:19f495fef0a3

rebase: change "result would have 3 parent" error message (BC)

The old error message "cannot use revision REV as base, result would have 3
parents" is confusing - why use REV as base? why add a new parent?.

This patch changes it to "cannot move parent", which seems better.

Differential Revision: https://phab.mercurial-scm.org/D342

Mercurial's documentation is kept in reStructuredText format, which is
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