Most tests were using %swift or similar substitutions, which did not
include the target triple and SDK. The driver was defaulting to the
host OS. Thus, we could not run the tests when the standard library was
not built for OS X.
Swift SVN r24504
patterns.
<rdar://problem/19184859> Swift methods defining closures that capture self in the "in" clause end up with two "self" variables in the debug info
Swift SVN r24461
Symmetry with what we did for Arrays says that Strings shoudl only
concatenate to Strings using "+". We have append() for adding single
characters.
Swift SVN r20997
<rdar://problem/17058606> for loop range variable shares name with iteration counter - that's wrong and misleading
<rdar://problem/16786106> [Xcode 6.1] foreach generators are always named "$generator"
Swift SVN r20683
