Strip spaces.
Fix Issue 12600 - Variant should support coercion to bool.
Give DList correct reference semantics
Cover issue 12566
Add some missing docs to std.traits.
Some cleanup of std.datetime.

This is mostly some cleanup which takes advantage of some stuff like
format being pure now, but it also removes the long month name and
case-insensitive months for simple time. I don't know why it was there
(probably idiocy on my part), and it violates the format for simple time
as defined by the documentation.
Merge pull request #2201 from AndrejMitrovic/TraitsDocs

Add some missing docs to std.traits.
Merge pull request #2200 from jmdavis/datetime

Some cleanup of std.datetime.
Converted more of std.datetime's examples to ddoc-ed unit tests.

The ones at the end which are removed from the docs are removed because
they're private, so there's no point in having an example in their
documentation.
Merge pull request #2205 from jmdavis/datetime

Converted more of std.datetime's examples to ddoc-ed unit tests.
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.
add NullSink output range
Merge pull request #2030 from WalterBright/add-BitBucket2

add BitBucket output range
fix Issue 7822 - lseek cast(int)offset should be lseek cast(off_t)offset
Make BigInt nothrow where possible
Merge pull request #2209 from SerialVelocity/master

Fix Issue 7822 - lseek cast(int)offset should be lseek cast(off_t)offset
more operators nothrow
fix import declarations
Merge pull request #2211 from 9rnsr/fix12359

fix import declarations
Mark std.stdio.File.seek as @trusted