On Thu, 1 May 2025 21:58:18 GMT, Oleksii Sylichenko <d...@openjdk.org> wrote:

>> Is `echo.` shorthand for `echo.exe`; if so, please change to the long form 
>> to make it clearer the echo program is being run.
>
> No, `echo.` is not an executable, this is a command of the Windows Command 
> Processor.
> 
> See: 
> https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/echo

That sounds brittle. The "echo." usage is not specified, only shown as an 
example.
Under what command parsing rule does it run exactly the "echo" builtin?

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PR Review Comment: https://git.openjdk.org/jdk/pull/23933#discussion_r2071947579

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