[Issue 19469] New: File.byLine reuses buffer

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19469

          Issue ID: 19469
           Summary: File.byLine reuses buffer
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: yshuiv7 at gmail.com

For example:

stdin.byLine.array;

Will give you an array of the same string. Although this is the correct
behavior, it will surprise someone who is new to the language.

I think we should make byLine duplicate the string by default.

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