FIX: Properly render HEAD with NeogitBranchHead highlight group

[gollth]

Sorry I just noticed, I introduced a small bug in my previous PR #934, where local checked out branches are not rendered with the NeogitBranchHead. With a user config of:

local blue = "#bae7ff"
local remote = "#b4eeb2"

vim.api.nvim_set_hl(0, "NeogitBranch", { fg = blue, bold = true })
vim.api.nvim_set_hl(0, "NeogitBranchHead", { fg = blue, bold = true, underline = true })
vim.api.nvim_set_hl(0, "NeogitRemote", { fg = remote, italic = true })

and a branch called foo checked out, this is what happens:

Before	After

This PR should fix this now =)

[CKolkey]

Looks great, lets just remove the commented out line and we're good :)

[gollth]

Dammit I noticed another bug, while retesting this...

Right now there is now way to display remote only branches. My impl will always highlight the last part of each branch with the NeogitBranch highlight group:

Before	After

Note in the example above, how github/master and gollth/master are both highlighted in green/blue indicating that my local master branch is both at github/master & gollth/master AT THE SAME TIME !?! Same goes with with the fix-head-log-graph being locally a commit further than its remote AND SIMULTANEOUSLY at its remote...

This should be fixed now as well, sorry for all the confusion @CKolkey. Git is hard... 🙈

[CKolkey]

Haha, no joke. The last 10~ months of working on this project have been a great deep-dive into so much of how git works under the hood, and I still feel like I know almost nothing. So many small details.

[gollth]

I can imagine o.O This Torvalds dude is quite the smart guy

[CKolkey]

No joke. Once (linux) is good luck. Twice (git)... impressive. I watched a talk he gave at google in like... 2010 maybe, the very early days of git. Very interesting to see him explain the shortcomings of every other VCS available, things that I definitely take for granted like "easy branching" and "fully decentralised". Good stuff.