[Issue 20134] autodecode should use replacementDchar rather than throwing on invalid

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20134

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://issues.dlang.org/sh
                   |                            |ow_bug.cgi?id=14519

--