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(gz) Change minimum required testtools version for selftest to 0.9.5 for
 unicode fixes (Martin [gz])

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doc/en/user-guide/hooks.txt
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itself.  The third argument is a name ``'My post_push hook'``, which can be
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used in progress messages and error messages.
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To reduce the start-up time of Bazaar it is also possible to "lazily" install hooks,
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using the ``bzrlib.hooks.install_lazy_named_hook`` function. This removes the need
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to load the module that contains the hook point just to install the hook. Here's lazy
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version of the example above::
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    from bzrlib import hooks
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    def post_push_hook(push_result):
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        print "The new revno is %d" % push_result.new_revno
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    hooks.install_lazy_named_hook('bzrlib.branch', 'Branch.hooks',
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        'post_push', post_push_hook, 'My post_push hook')
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Debugging hooks
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---------------
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