## Reprodution
if on Windows:
```Nim
when defined(windows):
var file: File
let succ = file.open(<aFileHandle>)
```
then `succ` will be false.
If tested, it can be found to fail with errno `22` and message: `Invalid
argument`
## Problem
After some investigations and tests,
I found it's due to the `mode` argument for `fdopen`.
Currently `NoInheritFlag`(`'N'` in Windows) is added to `mode` arg
passed to `_fdopen`, but if referring to
[Windows `_fdopen`
doc](https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/fdopen-wfdopen?view=msvc-170),
you'll find there is no `'N'` describled. That's `'N'` is not accepted
by `_fdopen`.
Therefore, the demo above will fail.
## In Addition
To begin with, technologically speaking, when opening with a
`fileHandle`(or called `fd`), there is no concept of fd-inheritable as
`fd` is opened already.
In POSIX, `NoInheritFlag` is defined as `e`.
It's pointed out in [POSIX `open`
man-doc](https://www.man7.org/linux/man-pages/man3/fopen.3.html) that
`e` in mode is ignored for fdopen(),
which means `e` for `fdopen()` is not wanted, just allowed.
Therefore, better to also not pass `e` to `fdopen`
---
In all, that's this PR.
dee55f587f