Mark std.stdio.File.this, eof and other methods as @safe or @trusted
Merge pull request #1993 from tom-tan/trusted-std-file-File-methods

Mark std.stdio.File.this, eof and other methods as @safe or @trusted
Make adjoin's example a DDoc'ed unittest
Make adjoin take by auto-ref
Fix issue 12183 : Avoid using floating point in std.algorithm.sort.

- Prevent valgrind from aborting (some x87 FP operation are not supported).
- Can be slower on machines that have a soft floating point ABI.
Merge pull request #1994 from monarchdodra/adjoinDoc

Maintenance in adjoin
Merge pull request #1946 from Geod24/make-valgrind-happy

Fix issue 12183 : Remove use of floating point in std.algorithm.quickSortImpl