[Issue 15995] std.conv.text and friends can be made faster with std.array.appender

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15995
Issue 15995 depends on issue 15992, which changed state.

Issue 15992 Summary: [REG2.072a] ICE with field variable of instantiated struct
https://issues.dlang.org/show_bug.cgi?id=15992

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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