+2011-11-07 Jonathan Wakely <jwakely.gcc@gmail.com>
+
+ * include/bits/basic_string.h (basic_string::at): Move adjacent to other
+ overload.
+ (basic_string::pop_back): Define.
+ * include/debug/string (__gnu_debug::basic_string::pop_back): Likewise.
+ * include/ext/vstring.h (__versa_string::pop_back): Likewise.
+ * config/abi/pre/gnu.ver: Add new symbols.
+ * testsuite/21_strings/basic_string/modifiers/char/pop_back.cc: New.
+ * testsuite/21_strings/basic_string/modifiers/wchar_t/pop_back.cc: New.
+ * testsuite/21_strings/basic_string/range_access.cc: Split to ...
+ * testsuite/21_strings/basic_string/range_access/char/1.cc: Here and ...
+ * testsuite/21_strings/basic_string/range_access/wchar_t/1.cc: Here.
+ * testsuite/ext/vstring/modifiers/char/pop_back.cc: New.
+ * testsuite/ext/vstring/modifiers/wchar_t/pop_back.cc: New.
+
2011-11-06 Jonathan Wakely <jwakely.gcc@gmail.com>
* doc/xml/manual/backwards_compatibility.xml: Fix autoconf tests for