Missing argument when using move

Using the move command makes it move to the new branch but throw out this error.

`fish, version 4.8.0`

```
move main
[: Missing argument at index 3
main =
^

~/.config/fish/conf.d/gitnow.fish (line 468):
if [ "$v_branch" = (__gitnow_current_branch_name) ]
^
in function 'move' with arguments 'main'

Switched to branch 'main'
Your branch is up to date with 'origin/main'.
```

Start at ~/.config/fish/conf.d/gitnow.fish around line 468 and inspect the move function's branch comparison. Reproduce the issue with `move main` in fish 4.8.0, then verify the command switches branches without the missing-argument error.

Written by the indexing model from the issue text.