issue 5224
Merge branch 'master' of github.com:D-Programming-Language/phobos into 5224
@blackwhale's review
@blackwhale's destruction
Fix the arguments of sameTail and make sameHead and sameTail @safe
Some fixes according to the comments by @ monarchdodra
Merge pull request #1428 from 9rnsr/fix10686

[REG2.064a] Issue 10686 - No [] operator overload for immutable Tuple

MERGED.
Merge pull request #1431 from tom-tan/fix-array-sameHead-and-sameTail

Fix the arguments of sameTail and make sameHead and sameTail @safe

Merged.
std.process: Remove incorrect usage of file RangeError ctor parameter

The code attempted to construct a RangeError object with a
"Command line is empty" string as the first parameter. However,
the first parameter specifies the source file (and defaults to
__FILE__), not the reason (which is always "Range violation").
Merge pull request #1435 from CyberShadow/std-process-rangeerror

std.process: Remove incorrect usage of file RangeError ctor parameter
Fix Issue 10216 - Bad warning in std.process.kill
Fix issue 10601.

If extension is empty, std.path.setExtension should be equivalent to
std.path.stripExtension. This special case is useful in generic code
that needs to alternate between, e.g., .exe on Windows and no executable
extension on Posix.
Simplify unittest.
Merge pull request #1438 from kyllingstad/kill-warning

Fix Issue 10216 - Bad warning in std.process.kill
Merge pull request #1409 from quickfur/issue10601

Fix issue 10601.
Merge pull request #1162 from andralex/5224

Fix Issue 5224 - std.algorithm.remove!(SwapStrategy.unstable) doesn't work
fix Issue 10732 - Example code for std.utf.toUTFindex does not work
[trivial] fix code style
[trivial] Use ddoc unittest
[trivial] unittest code clean up