bug#20489: 25.0.50; next-error-find-buffer chooses non-current buffer without good reason

[Richard Stallman]

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  > > On that subject: why did we make next-error-last-buffer always 
buffer-local?

  > next-error-last-buffer is buffer-local to keep the reference to the
  > parent buffer used to navigate to the current buffer, so the next call of
  > next-buffer will use the same parent buffer to continue navigation from it.

How about adding a comment to this effect?

-- 
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
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