ostream state preservation

src/util.cpp

@@ -240,6 +240,7 @@ std::ostream& operator<<(std::ostream& strm, const Escaper& esc)
                 if(c>=' ' && c<='~') { // isprint()
                     strm.put(c);
                 } else {
+                    Restore R(strm);
                     strm<<"\\x"<<std::hex<<std::setw(2)<<std::setfill('0')<<unsigned(c&0xff);
                 }
                 continue;