Merge from trunk (now lexical_cast has optimized conversions to and from array<>, fixes #7065)

[SVN r79364]

test/implicit_cast.cpp

@@ -28,7 +28,7 @@ int main()
 
     type<foo> f = check_return(boost::implicit_cast<foo>("hello"));
     type<long> z = check_return(boost::implicit_cast<long>(foo("hello")));
-    
+
     // warning supression:
     (void)x;
     (void)f;