`#loogle` command's unexpected behavior when used with `#guard_msgs`

This raise no error.

```lean
import LeanSearchClient.LoogleSyntax

/--
info: Loogle Search Results
• #check Option.get!
-/
#guard_msgs in
  #loogle Option ?a → ?a, "get!"
```

But this fails.

```lean
import LeanSearchClient.LoogleSyntax

/--
info: Loogle Search Results
• #check Option.get!
-/
#guard_msgs in
  #loogle Option ?a → ?a, "get!"

/- hello -/
```