nixfmt modifies integers to signed 32 bits integers on 32 bit platforms

[symphorien]

Description

nixfmt formats 3000000000 into -1294967296 on armv7 (a 32 bit platform)

Steps to reproduce

$  echo '3000000000' | /nix/store/g5sxhbx8c0h585rnyacf3caa1k9pzq3n-nixfmt-unstable-2024-08-08/bin/nixfmt
-1294967296                                                                                                                                                                                                                                                                                                                                                                                         

3000000000 is a 32 bit unsigned integer with the first bit set: reinterpreted as a signed 32 bit integer it becomes -1294967296

Context:

32bit nix handles these numbers fine:

$  nix repl
Welcome to Nix 2.18.5. Type :? for help.

nix-repl> 3000000000
3000000000

nixfmt does not have this issue on x86_64 (and presumably on all 64bit platforms)

[infinisil]

Damn, good catch, made a PR, please try it out: #262