[Issue 16587] split("", "x") should be ""

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16587

--- Comment #1 from Vladimir Panteleev <thecybershadow at gmail.com> ---
Example real-life scenarios:

- Comma-delimited lists in program arguments or configuration files. The string
variables will be empty unless populated, then split afterwards.

- `libPaths ~= environment.get("LIBPATH", null).split(":")` will now search the
current directory.

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