Fixing whitespace problems

llvm-svn: 111758
diff --git a/libcxx/test/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp b/libcxx/test/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
index df57f25..33488d4 100644
--- a/libcxx/test/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
+++ b/libcxx/test/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
@@ -12,7 +12,7 @@
 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
 // class basic_istringstream
 
-// explicit basic_istringstream(const basic_string<charT,traits,allocator>& str, 
+// explicit basic_istringstream(const basic_string<charT,traits,allocator>& str,
 //                              ios_base::openmode which = ios_base::in);
 
 #include <sstream>