`nix repl` splits long lines in `repl-history`

[l0b0]

Describe the bug

Lines more than 255 characters long are split in repl-history, making it much harder to reuse the command history.

Steps To Reproduce

1. Run nix repl
2. Run a single-line command which is longer than 255 characters, such as nixosConfigurations.ci-full-unstable.pkgs.lib.filterAttrs (n: v: n != "frp" && v.enable.isDefined or false && v.enable.value) (checks.x86_64-linux.androidBackupService.extendNixOS { module = { options, ... }: { passthru = { inherit options; }; }; }).node.machine.passthru.options.services
3. Exit nix repl

Observe the split command in repl-history.

Expected behavior

repl-history should contain the command above on a single line.

Metadata

nix-env (Nix) 2.31.3

Additional context

Checklist

• checked latest Nix manual (source)
• checked open bug issues and pull requests for possible duplicates

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