Yes, I believe this is a Chromium bug, as `word-wrap` is specifically about break opportunities *within* words where they wouldn't normally be allowed. A long string of `=` characters is not a "word". (I haven't re-read all the old discussion yet, though.) Basically, I think `word-wrap` is the wrong property for an author to use an example like this; the desired behavior is available (more interoperably) using `overflow-wrap:break-word`.
Bug 1595645 Comment 3 Edit History
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Yes, I believe this is a Chromium bug, as `word-break` is specifically about break opportunities *within* words where they wouldn't normally be allowed. A long string of `=` characters is not a "word". (I haven't re-read all the old discussion yet, though.) Basically, I think `word-break` is the wrong property for an author to use an example like this; the desired behavior is available (more interoperably) using `overflow-wrap:break-word`. [edited: I originally wrote `word-wrap` here where I meant to refer to `word-break`, making the comment rather confusing.]