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Re:Show HN: A general tree editor component – Vim shortcuts,... by davvid on Thursday April 10, 2014 @09:43PM (#7570798)
This is nice! A few comments:

When you are on a closed node, hitting "l" (lower-case L) would be a nice way to open that node.

When you are on a opened node, hitting "h" would be a nice way to close that node.

It seems nicely vimish. I have a very similar set of vim-ish keyboard hotkeys on the tree widgets in git-cola.

Re:Show HN: A general tree editor component – Vim shortcuts,... by jaredly on Thursday April 10, 2014 @10:07PM (#7570881)
alt-l opens, alt-h closes currently. h takes you to the parent of the current node.