fix handling of bzr return values
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@ -285,7 +285,7 @@ endfunction
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function! s:repo_get_diff_bzr(path) abort
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if executable('bzr')
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let diff = system('bzr diff --using '. s:difftool .' --diff-options=-U0 -- '. s:escape(a:path))
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return v:shell_error ? '' : diff
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return ((v:shell_error == 0) || (v:shell_error == 1) || (v:shell_error == 2)) ? diff : ''
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endif
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endfunction
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