[Issue 15949] Improve readtext handling of byte order mark (BOM)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15949

Andre <andre at s-e-a-p.de> changed:

           What    |Removed                     |Added
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                 CC|                            |andre at s-e-a-p.de

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