Abe Jellinek ef82becf00

Merge attachments and update notes (#2336) ...

We follow a different merge procedure for each attachment type:

- For PDF attachments, compare by MD5. If no match, get the top 50 words
  in the attachment's text and hash those, then check again for a match.
  Update references to item keys in notes and annotations.
- For web (snapshot / link) attachments, compare by title and URL.
  Prefer a title + URL match but accept a title-only match.
- For other attachment types, keep all attachments from all items being
  merged.

Also:

- Move most merge tests from Duplicates to Items#merge(). It just doesn't
  make sense to worry about the UI in these.

2022-03-09 17:26:26 -05:00

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