`log` missing some characters when highlighted

**Describe the bug**

The `log` appears to be missing characters when highlighted.

Here's the log before any of the problematic rows are highlighted (good):

Here's the log when the second row in the screenshot is highlighted (bad - missing `─` _after_ branch crossover):

Here's the log when the third row is highlighted (good):

Here's the log when the fourth row is highlighted (bad - missing `─` _before_ branch crossover):

**To Reproduce**
Steps to reproduce the behavior:

1. Make a branch like this:

```
│ ◯
│ │ ◯
◯─│─╯
◯ │
```

2. Scroll over lines

**Expected behavior**

I would expect no symbols before a row is highlighted to disappear on highlight, just the color or style of the lines should change. lazygit does change the symbols to connect the line to the parent, so the symbols do change in a manner that is useful.

However the change in some cases causes missing characters. It seems like an extra whitespace (i.e. ` `) is added somewhere.

**Version info:**

```shell
$ lazygit --version
commit=6fcb7eb8bb616c170506312870b3bf15f3dbe37c, build date=2024-05-19T10:15:28Z, build source=binaryRelease
, version=0.42.0, os=darwin, arch=arm64, git version=2.39.3 (Apple Git-146)
```