[Issue 13241] writeln no longer flushes stdout

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13241

--- Comment #5 from Vladimir Panteleev <thecybershadow at gmail.com> ---
Yes, though note that the previous behavior was to flush only when writing to
screen. When the program output is redirected to a file, AFAIK the streams were
flushed only explicitly (or when the buffer is full).

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