Fixed test failure in is_iec559.pass.cpp on darwin-ppc32. Thanks to David Fang for the report (and suggested fix)

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@199694 91177308-0d34-0410-b5e6-96231b3b80d8
Removed extra space; thanks to thakis_'s eagle eye

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@199695 91177308-0d34-0410-b5e6-96231b3b80d8