Fix comments in libstdc++ header and test

	* include/bits/ios_base.h: Correct comment.
	* testsuite/util/testsuite_hooks.h: Likewise.

From-SVN: r246657

libstdc++-v3/ChangeLog

 2017-04-03  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/bits/ios_base.h: Correct comment.
+	* testsuite/util/testsuite_hooks.h: Likewise.
+
 	* doc/xml/manual/status_cxx2017.xml: Update C++17 status table.
 	* doc/xml/manual/appendix_contributing.xml (contrib.organization): Add
 	directories for debug, parallel and profile headers.

libstdc++-v3/include/bits/ios_base.h

@@ -52,8 +52,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   // The following definitions of bitmask types are enums, not ints,
   // as permitted (but not required) in the standard, in order to provide
-  // better type safety in iostream calls.  A side effect is that
-  // expressions involving them are no longer compile-time constants.
+  // better type safety in iostream calls.  A side effect is that in C++98
+  // expressions involving them are not compile-time constants.
   enum _Ios_Fmtflags 
     { 
       _S_boolalpha 	= 1L << 0,

libstdc++-v3/testsuite/util/testsuite_hooks.h

@@ -247,8 +247,8 @@ namespace __gnu_test
     static unsigned int _M_count;
   };
 
-  // An class of objects that can be used for validating various
-  // behaviours and guarantees of containers and algorithms defined in
+  // A class of objects that can be used for validating various
+  // behaviors and guarantees of containers and algorithms defined in
   // the standard library.
   class copy_tracker
   {