parseInt accepts more than digits

[nitely]

Description

parseInt accepts an initial sign and any number of underscores after the first digit, but the documentation does not mention this.

import std/parseutils

var res: int
echo parseInt("-123", res)
echo res
echo parseInt("+123", res)
echo res
discard parseInt("1__2__3____", res)
echo res

Nim Version

Nim Compiler Version 2.1.1 [Linux: amd64]
Compiled at 2024-04-17
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 20698b8
active boot switches: -d:release

Current Output

4
-123
4
123
123

Expected Output

the same output

Possible Solution

Document what is accepted as input.

Additional Information

No response