k-takata / vim / 366

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Fix problems with 'linebreak' and block visual mode

When 'linebreak' is set, some operators in block visual mode don't work
as expected.

1. Create a window with the size 20x10.
   `:10new | 20vnew`
2. Set a line.
   `:call setline(1, '1234567890 2234567890 3234567890')`
3. Set 'linebreak'.
   `:set lbr`
4. Do some blockwise operations.
   E.g. yank:
   ```
   :exec "norm! ^w\<C-V>ey"
   :call assert_equal('2234567890', @@)
   ```
   increment and decrement:
   ```
   :exec "norm! ^w\<C-V>\<C-A>w\<C-V>\<C-X>"
   :call assert_equal('1234567890 3234567890 2234567890', getline(1))
   ```
   replace:
   ```
   :exec "norm! ^w\<C-V>3lraw\<C-V>3lrb"
   :call assert_equal('1234567890 aaaa567890 bbbb567890', getline(1))
   ```

There was a mismatch of `curwin->w_p_lbr` between `do_pending_operator()`
and `block_prep()`.

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