$ hg parents changeset: user: Bryan O'Sullivan <bos@serpentine.com> summary: A new hello for a new day. changeset: tag: tip parent: user: Bryan O'Sullivan <bos@serpentine.com> summary: Added an extra line of output $ cat hello.c /* * Placed in the public domain by Bryan O'Sullivan. This program is * not covered by patents in the United States or other countries. */ #include <stdio.h> int main(int argc, char **argv) { printf("once more, hello.\n"); printf("hello, world!\"); printf("hello again!\n"); return 0; }