[Issue 16983] std.range.takeNone examples does not compile

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16983

b2.temp at gmx.com changed:

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

--- Comment #1 from b2.temp at gmx.com ---
You must import the module where the example stands and it works. This is true
for any example in phobos, so here just add import `import std.range;`

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