compat / terminal.hon commit blame-options.txt: explain that -L <start> and <end> are optional (df83d5c)
   1#ifndef COMPAT_TERMINAL_H
   2#define COMPAT_TERMINAL_H
   3
   4char *git_terminal_prompt(const char *prompt, int echo);
   5
   6#endif /* COMPAT_TERMINAL_H */