[Issue 18689] std.format should always throw FormatException on bad specs/arguments

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18689

--- Comment #1 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/phobos

https://github.com/dlang/phobos/commit/e2d791bcf1c2a129ec988589b7cabc9c65721dde
Fix Issue 18689 - std.format should throw FormatException on bad format spec

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