[Issue 19403] Make std.string.stripLeft on char array @nogc nothrow

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19403

--- Comment #1 from Nathan S. <n8sh.secondary at hotmail.com> ---
Pull request: https://github.com/dlang/phobos/pull/6769

--