Differences From Artifact [b3f56ec17d]:

• File src/checkin.c — part of check-in [1dd2527f2a] at 2019-04-25 14:28:41 on branch trunk — Make full use of the new file_tempname() in "fossil diff" with both --from and --to options. Improve file_tempname() to allow for a suggested differentiator tag. (user: drh size: 94773) [more...]

To Artifact [742ea1bf3b]:

• File src/checkin.c — part of check-in [66d55e9b43] at 2019-06-16 19:22:04 on branch trunk — Removed the "or --allow-fork" advice output from "fossil checkin" when forcing the checkin would fork the branch. It's good for Fossil to have this option, especially for automated tooling that needs to just bull forward blindly, but it's bad advice to give to interactive users. Let them discover it via --help, if they learn of it at all. (user: wyoung size: 94733)

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  ** or --force flags is used, or unless this is a private check-in.
  ** The initial commit MUST have tags "trunk" and "sym-trunk".
  */
  if( !vid ){
    if( sCiInfo.zBranch==0 ){
      if( allowFork==0 && forceFlag==0 && g.markPrivate==0
        && db_exists("SELECT 1 from event where type='ci'") ){
        fossil_fatal("would fork.  \"update\" first or use --allow-fork.");
      }
      sCiInfo.zBranch = db_get("main-branch", "trunk");
    }
  }else if( sCiInfo.zBranch==0 && allowFork==0 && forceFlag==0
    && g.markPrivate==0 && !is_a_leaf(vid)
  ){
    fossil_fatal("would fork.  \"update\" first or use --allow-fork.");
  }

  /*
  ** Do not allow a commit against a closed leaf unless the commit
  ** ends up on a different branch.
  */
  if(

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  ** or --force flags is used, or unless this is a private check-in.
  ** The initial commit MUST have tags "trunk" and "sym-trunk".
  */
  if( !vid ){
    if( sCiInfo.zBranch==0 ){
      if( allowFork==0 && forceFlag==0 && g.markPrivate==0
        && db_exists("SELECT 1 from event where type='ci'") ){
        fossil_fatal("would fork.  \"update\" first.");
      }
      sCiInfo.zBranch = db_get("main-branch", "trunk");
    }
  }else if( sCiInfo.zBranch==0 && allowFork==0 && forceFlag==0
    && g.markPrivate==0 && !is_a_leaf(vid)
  ){
    fossil_fatal("would fork.  \"update\" first.");
  }

  /*
  ** Do not allow a commit against a closed leaf unless the commit
  ** ends up on a different branch.
  */
  if(