negotiator / default.hon commit difftool: make --gui, --tool and --extcmd mutually exclusive (7f978d7)
   1#ifndef NEGOTIATOR_DEFAULT_H
   2#define NEGOTIATOR_DEFAULT_H
   3
   4struct fetch_negotiator;
   5
   6void default_negotiator_init(struct fetch_negotiator *negotiator);
   7
   8#endif