Antoine Stevan a78cd6e231
FIX: add a space after the default left prompt (#9074)
# Description
when running `nushell` with the `--no-config-file` option, the left
prompt does not have a space to separate the directory path from the
user input.
in this PR i add a space there to make the prompt easier to read when
using `--no-config-file`!

# User-Facing Changes
before: https://asciinema.org/a/581733
after: https://asciinema.org/a/581734

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
-  `toolkit test`
-  `toolkit test stdlib`

# After Submitting
```
$nothing
```
2023-05-08 13:00:44 -05:00
..
2023-04-26 01:05:23 +02:00