eliminate useless conversion of std::string.c_str back to std::string * lo-array-errwarn.cc (index_exception::message): Don't call c_str() on message string only to convert it back to std::string when returning from function.

((nil .
      ((c-file-style . "gnu")
       (indent-tabs-mode . nil)
       (fill-column . 72)))
 (change-log-mode . ((indent-tabs-mode . t)))
 (makefile-mode . ((indent-tabs-mode . t))))