Editing Apple butterfly mechanism (section)

==References==
<references>
<ref name="Apple-MB-PR">Apple — [http://www.apple.com/pr/library/2015/03/09Apple-Unveils-All-New-MacBook.html Apple Unveils All-New MacBook] Dated 2015-03-09. Retrieved 2015-07-23.</ref>
<ref name="arsapple16liveblog">Ars Technica live blog — [http://live.arstechnica.com/hello-again-apples-october-2016-mac-event/ Hello Again: Apple’s October 2016 Mac event] Dated 2016-10-27. Retrieved 2016-10-27.</ref>
<ref name="ifixitmbp16">iFixit — [https://www.ifixit.com/Teardown/MacBook+Pro+13-Inch+Function+Keys+Late+2016+Teardown/72415 MacBook Pro 13" Function Keys Late 2016 Teardown]. Dated 2016-11-01. Retrieved 2016-11-01.</ref>
<ref name="ifixitblog18">IFixit blog—[https://ifixit.org/blog/10319/butterfly-keyboard-teardown/ Anatomy of a Butterfly (Keyboard)—Teardown Style], by Sam Lionheart. Dated 2018-07-19. Retrieved 2018-10-16</ref>
<ref name="appleinsider">''Apple Insider'' magazine—
[https://appleinsider.com/articles/18/04/30/2016-macbook-pro-butterfly-keyboards-failing-twice-as-frequently-as-older-models 2016 MacBook Pro butterfly keyboards failing twice as frequently as older models]. By Mike Wierthele. Dated 2018-04-30. Retrieved 2018-05-08</ref>
<ref name="macworld2019mbkb">''MacWorld'' magazine—[https://www.macworld.com/article/3397036/apple-improves-butterfly-keyboard-again-offers-to-free-fixes-for-some-macbook-models.html]. Dated 2019-05-21.</ref>
<ref name="ifixitvideo19">iFixit Video on Youtube—[https://www.youtube.com/watch?v=cJJQPY3g8zQ We Found the "New Material" in Apple's Fourth Butterfly Keyboard]. Posted 2019-05-24.</ref>
</references>