notebooks: fix eclipse to be ellipse in bm4

[wd15]

Address #1501

[review-notebook-app[bot]]

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[wd15]

Travis CI seems to be broken. Getting something about "usnistgov" not having a subscription.

https://app.travis-ci.com/github/usnistgov/pfhub/requests

[pfhub]

@wd15, the new version of the PFHub website is available at https://random-cat-1503.surge.sh

[pfhub]

@wd15, the new version of the PFHub website is available at https://random-cat-1503.surge.sh

[wd15]

@tkphd, this one is ready for you to review

[pfhub]

Successful teardown of random-cat-1503.surge.sh