[Bug] Curved separators do not extend to full height of character box
I'm trying to set up a status line plugin in NeoVim, and I'm running into an issue with the curved separator characters (``, ``, ``, and ``). While configuring my status line, I noticed that these characters do not extend the full height of the character. The chevron separator characters (``, ``, ``, and ``) don't seem to share this problem.

<img width="196" alt="Screen Shot 2021-09-06 at 12 51 06 AM" src="https://user-images.githubusercontent.com/361591/132167452-d12aff43-ebf8-4d63-ae43-551870ace7c7.png">

<img width="181" alt="Screen Shot 2021-09-06 at 12 53 26 AM" src="https://user-images.githubusercontent.com/361591/132167463-5ddc71f8-3770-40a4-88e0-b81ed032833f.png">

<img width="198" alt="Screen Shot 2021-09-06 at 12 50 47 AM" src="https://user-images.githubusercontent.com/361591/132167472-969e1ff2-1675-4561-9e81-e64b0841ee7a.png">

Unfortunately, this ruins the look of my status line:

<img width="901" alt="Screen Shot 2021-09-06 at 12 40 05 AM" src="https://user-images.githubusercontent.com/361591/132167534-5d44495a-4a14-4c73-b384-0cb31d7bbca3.png">

I'm sure this issue is related to the line height of 120% I'm using for my characters. However, the font is so much more readable at that line height that I hesitate to change it, and since the chevron characters seem to work fine, I thought I'd open up an issue.

Here are some exaggerated views of the problem at 200% line height:

<img width="989" alt="Screen Shot 2021-09-06 at 1 00 04 AM" src="https://user-images.githubusercontent.com/361591/132167948-7611c354-5124-423b-8d1d-d94560ec790d.png">
<img width="986" alt="Screen Shot 2021-09-06 at 1 00 36 AM" src="https://user-images.githubusercontent.com/361591/132167949-bcdd3b09-ed13-452b-ab5e-6fb1e5fa9cf6.png">

#### 🔧 Your Setup

 _Which font are you using?_

I'm using the lastest version of Sauce Code Pro.

_Which terminal emulator are you using?_

iTerm 2 3.4.8 with the following profile text settings:

<img width="956" alt="Screen Shot 2021-09-06 at 12 44 53 AM" src="https://user-images.githubusercontent.com/361591/132166517-76944aa0-81ec-45cb-bf03-b46735113d5d.png">

- _Are you using OS X, Linux or Windows? And which specific version or distribution?_

I'm running macOS 11.5.2.

#### ★ Optional

Thanks for the awesome fonts!
