windows: cryptic: The parameter is incorrect

[timotheecour]

links

• this was fixed Improve error message for osproc.startProcess when command does not exist · Issue #2183 · nim-lang/Nim
• but re occurred in another context in
  https://dev.azure.com/nim-lang/255dfe86-e590-40bb-a8a2-3c0295ebdeb1/_apis/build/builds/13280/logs/104

2021-02-18T07:59:07.5357266Z CC: testament.nim
2021-02-18T07:59:08.2501771Z Hint:  [Link]
2021-02-18T07:59:08.4436459Z Hint: 114029 lines; 8.303s; 180.617MiB peakmem; Debug build; proj: testament\testament; out: D:\a\1\s\testament\testament.exe [SuccessX]
2021-02-18T07:59:08.4438342Z Hint:  D:\a\1\s\testament\testament.exe --batch:0_3 all -d:nimCoroutines [Exec]
2021-02-18T07:59:08.4471471Z oserr.nim(94)            raiseOSError
2021-02-18T07:59:08.4472636Z Error: unhandled exception: The parameter is incorrect.
2021-02-18T07:59:08.4473581Z  [OSError]
2021-02-18T07:59:08.4705745Z FAILURE
2021-02-18T07:59:08.4871228Z ##[section]Finishing: Run CI

• https://www.diskinternals.com/partition-recovery/external-hdd-having-the-parameter-is-incorrect-error/

[timotheecour]

fixed by making sure there's no space before command in windows in this:

execExternalProgram(conf, cmdPrefix & output.quoteShell & ' ' & conf.arguments)

in nim-lang#16871