bug#19101: 25.0.50; vc-print-log puts wrong buffer into log-view-mode

[Ivan Shmakov]

>>>>> Richard Copley <rcopley@gmail.com> writes:

 > Visit a file under Subversion or RCS (not Git or Bazaar) and invoke
 > `vc-print-log'.  The log buffer should be put into log-view-mode, but
 > it isn't.  The buffer visiting the file is put into log-view-mode
 > instead.

        This is likely to be caused by VC assuming that the ‘print-log’
        backend function leaves the log buffer as the current one.
        It doesn’t seem documented, and frankly, I’ve stumbled on that
        myself while working on vc-mw.el.

        My suggestion would be for vc-print-log-internal to explicitly
        set-buffer after (successfully) invoking ‘print-log’.

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