[Issue 13533] DateTime.fromSimpleString should accept numerical months

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13533

--- Comment #1 from Martin Nowak <code at dawg.eu> ---
Replacing the T with a space seems to be a small deviation from ISO8601 used by
some people for better readability, so the correct place for this would be
fromISOExtString.

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