prompt.hon commit t1300: `--unset-all` can leave an empty section behind (bug) (b73bdc3)
   1#ifndef PROMPT_H
   2#define PROMPT_H
   3
   4#define PROMPT_ASKPASS (1<<0)
   5#define PROMPT_ECHO    (1<<1)
   6
   7char *git_prompt(const char *prompt, int flags);
   8
   9#endif /* PROMPT_H */