Code folding does not work properly for the last element in a group

[brennenberkley]

Prerequisites

• [X ] Put an X between the brackets on this line if you have done all of the following:
  • Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
  • Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
  • Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
  • Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
  • Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

Description

Folding all code and then unfolding a section reveals that the last element in that section isn't folder like the rest of the elements are

Steps to Reproduce

1. Copy the following into atom:

people:
  Bill:
    age: 25
    weight: 140
  Kim:
    age: 22
    weight: 125

2. Go to Edit->Folding->Fold All
3. Unfold people by clicking the 3 dots next to it

Expected behavior:

people:
  Bill: ...
  Kim: ...

Actual behavior:

people:
  Bill: ...
  Kim:
    age: 22
    weight: 125

Reproduces how often: 100%

Versions

Atom : 1.28.2
Electron: 2.0.5
Chrome : 61.0.3163.100
Node : 8.9.3
Mac OS High Sierra (10.13.6)

[Aerijo]

@brennenberkley I see this issue is old, but do you know if this still reproduces? It folded as expected when I tried just now.