Strip spaces.
Fix Issue 12600 - Variant should support coercion to bool.
Tweak min and max for yet more efficiency

I checked the generated assembly code, and it looks pretty damn good. I've not been able to achieve any better anyways.
Give DList correct reference semantics
Cover issue 12566
Fix issue 12771 - Variant opIndex for static arrays is not implemented.
Constrain isSomeString
Shorten array checks to isArray
fix Issue 10948 - BitArray.opEquals is invalid

https://issues.dlang.org/show_bug.cgi?id=10948

Implemented the fix as proposed by nbelov on Bugzilla. Included are unit tests which would have triggered this bug and also fixed it in opCmp.

The issue was that the 32 bit expression "(1 << n)" was treated as being of size_t, which lead to incorrect bit patterns on 64 bit environments.
Make BigInt nothrow where possible
more operators nothrow
Mark std.stdio.File.seek as @trusted
Merge pull request #2214 from tom-tan/trusted-stdio-File-seek

Mark std.stdio.File.seek as @trusted
Merge pull request #2210 from dymk/bignum-nothrow

Make BigInt nothrow where possible
Mark std.stdio.File.tmpfile, wrapFile and size as @safe
Merge pull request #2215 from tom-tan/safe-stdio-File-tmpfile-wrapFile-size

Mark std.stdio.File.tmpfile, wrapFile and size as @safe
Merge pull request #2204 from jblume/issue-10948

fix Issue 10948 - BitArray.opEquals is invalid
Merge pull request #2061 from monarchdodra/DListFinal

Give DList correct reference semantics
Merge pull request #2111 from AndrejMitrovic/Fix12600

Issue 12600 - Variant should support coercion to bool
Merge pull request #2053 from monarchdodra/maxTweak

Tweak min and max for yet more efficiency