Fixing whitespace problems

llvm-svn: 111764
diff --git a/libcxx/test/strings/basic.string/string.cons/copy_assignment.pass.cpp b/libcxx/test/strings/basic.string/string.cons/copy_assignment.pass.cpp
index bbde44d..c6e34e1 100644
--- a/libcxx/test/strings/basic.string/string.cons/copy_assignment.pass.cpp
+++ b/libcxx/test/strings/basic.string/string.cons/copy_assignment.pass.cpp
@@ -9,7 +9,7 @@
 
 // <string>
 
-// basic_string<charT,traits,Allocator>& 
+// basic_string<charT,traits,Allocator>&
 //   operator=(const basic_string<charT,traits,Allocator>& str);
 
 #include <string>