Fossil with Commonmark

    if( rid==0 ){
      fossil_fatal("no history for file: %b", &fname);
    }
    zFilename = blob_str(&fname);
    db_prepare(&q,
        "SELECT b.uuid, ci.uuid, date(event.mtime,'localtime'),"
        "       coalesce(event.ecomment, event.comment),"
        "       coalesce(event.euser, event.user),"
        "       (SELECT value FROM tagxref WHERE tagid=%d AND tagtype>0"
                                " AND tagxref.rid=mlink.mid)" /* Tags */
        "  FROM mlink, blob b, event, blob ci, filename"
        " WHERE filename.name=%Q %s"
        "   AND mlink.fnid=filename.fnid"
        "   AND b.rid=mlink.fid"
        "   AND event.objid=mlink.mid"
        "   AND event.objid=ci.rid"
        " ORDER BY event.mtime DESC LIMIT %d OFFSET %d",
        TAG_BRANCH, zFilename, filename_collation(), iLimit, iOffset
    );
    blob_zero(&line);
    if( iBrief ){
      fossil_print("History of %s\n", blob_str(&fname));
    }
    while( db_step(&q)==SQLITE_ROW ){
      const char *zFileUuid = db_column_text(&q, 0);
      const char *zCiUuid = db_column_text(&q,1);
      const char *zDate = db_column_text(&q, 2);
      const char *zCom = db_column_text(&q, 3);
      const char *zUser = db_column_text(&q, 4);
      const char *zBr = db_column_text(&q, 5);
      char *zOut;
      if( zBr==0 ) zBr = "trunk";
      if( iBrief ){
        fossil_print("%s ", zDate);
        zOut = sqlite3_mprintf("[%.10s] %s (user: %s, artifact: [%.10s], branch: %s)",
                               zCiUuid, zCom, zUser, zFileUuid, zBr);
        comment_print(zOut, 11, 79);
        sqlite3_free(zOut);
      }else{
        blob_reset(&line);
        blob_appendf(&line, "%.10s ", zCiUuid);
        blob_appendf(&line, "%.10s ", zDate);
        blob_appendf(&line, "%8.8s ", zUser);
        blob_appendf(&line, "%8.8s ", zBr);
        blob_appendf(&line,"%-40.40s\n", zCom );
        comment_print(blob_str(&line), 0, 79);
      }
    }
    db_finalize(&q);
    blob_reset(&fname);
  }

  if( backoutFlag ){
    int t = pid;
    pid = mid;
    mid = t;
  }
  if( !is_a_version(pid) ){
    fossil_fatal("not a version: record #%d", pid);
  }
  if( mid==pid ){
    fossil_print("This merge is a no-op.\n");
    return;
  }
  if( detailFlag ){
    print_checkin_description(mid, 12, "merge-from:");
    print_checkin_description(pid, 12, "baseline:");
  }
  vfile_check_signature(vid, 1, 0);
  db_begin_transaction();

    if( rid ) return rid;
  }

  /* Date and times */
  if( memcmp(zTag, "date:", 5)==0 ){
    rid = db_int(0, 
      "SELECT objid FROM event"
      " WHERE mtime<=julianday(%Q,'utc') AND type GLOB '%q'"
      " ORDER BY mtime DESC LIMIT 1",
      &zTag[5], zType);
    return rid;
  }
  if( is_date(zTag) ){
    rid = db_int(0, 
      "SELECT objid FROM event"
      " WHERE mtime<=julianday(%Q,'utc') AND type GLOB '%q'"
      " ORDER BY mtime DESC LIMIT 1",
      zTag, zType);
    if( rid) return rid;
  }

  /* Deprecated date & time formats:   "local:" + date-time and
  ** "utc:" + date-time */

# define stifle_history(X)
#endif

#if defined(_WIN32) || defined(WIN32)
# include <io.h>
#define isatty(h) _isatty(h)
#define access(f,m) _access((f),(m))
#undef popen
#define popen(a,b) _popen((a),(b))
#undef pclose
#define pclose(x) _pclose(x)
#else
/* Make sure isatty() has a prototype.
*/
extern int isatty(int);
#endif

  const char *zRemove      /* Parameter to omit */
){
  style_submenu_element(zMenuName, zMenuName, "%s",
                        url_render(pUrl, zParam, zValue, zRemove, 0));
}


/*
** Convert a symbolic name used as an argument to the a=, b=, or c=
** query parameters of timeline into a julianday mtime value.
*/
double symbolic_name_to_mtime(const char *z){
  double mtime;
  int rid;
  if( z==0 ) return -1.0;
  rid = symbolic_name_to_rid(z, "ci");
  if( rid==0 ) return -1.0;
  mtime = db_double(0.0, "SELECT mtime FROM event WHERE objid=%d", rid);
  return mtime;
}

/*
** The value of one second in julianday notation
*/
#define ONE_SECOND (1.0/86400.0)

/*
** zDate is a localtime date.  Insert records into the
** "timeline" table to cause <hr> to be inserted before and after
** entries of that date.  If zDate==NULL then put dividers around
** the event identified by rid.
*/
static void timeline_add_dividers(double rDate, int rid){
  char *zToDel = 0;
  if( rDate==0 ){

    rDate = db_double(0.0, "SELECT mtime FROM event WHERE objid=%d", rid);


  }
  db_multi_exec(
    "INSERT INTO timeline(rid,sortby,etype)"
    "VALUES(-1,%.16g,'div')",
    rDate-ONE_SECOND
  );
  db_multi_exec(
    "INSERT INTO timeline(rid,sortby,etype)"
    "VALUES(-2,%.17g,'div')",
    rDate+ONE_SECOND
  );
  fossil_free(zToDel);
}


/*
** WEBPAGE: timeline
**
** Query parameters:
**
**    a=TIMEORTAG    after this event
**    b=TIMEORTAG    before this event
**    c=TIMEORTAG    "circa" this event
**    n=COUNT        max number of events in output
**    p=UUID         artifact and up to COUNT parents and ancestors
**    d=UUID         artifact and up to COUNT descendants
**    dp=UUUID       The same as d=UUID&p=UUID
**    t=TAGID        show only check-ins with the given tagid
**    r=TAGID        show check-ins related to tagid
**    u=USER         only if belonging to this user
**    y=TYPE         'ci', 'w', 't', 'e'

  HQuery url;                        /* URL for various branch links */
  int from_rid = name_to_typed_rid(P("from"),"ci"); /* from= for paths */
  int to_rid = name_to_typed_rid(P("to"),"ci");    /* to= for path timelines */
  int noMerge = P("nomerge")!=0;          /* Do not follow merge links */
  int me_rid = name_to_typed_rid(P("me"),"ci");  /* me= for common ancestory */
  int you_rid = name_to_typed_rid(P("you"),"ci");/* you= for common ancst */
  int pd_rid;
  double rBefore, rAfter, rCirca;     /* Boundary times */

  /* To view the timeline, must have permission to read project data.
  */
  pd_rid = name_to_typed_rid(P("dp"),"ci");
  if( pd_rid ){
    p_rid = d_rid = pd_rid;
  }

    }
    if ( zSearch ){
      blob_appendf(&sql,
        " AND (event.comment LIKE '%%%q%%' OR event.brief LIKE '%%%q%%')",
        zSearch, zSearch);
      url_add_parameter(&url, "s", zSearch);
    }
    rBefore = symbolic_name_to_mtime(zBefore);
    rAfter = symbolic_name_to_mtime(zAfter);
    rCirca = symbolic_name_to_mtime(zCirca);
    if( rAfter>0.0 ){
      if( rBefore>0.0 ){
        blob_appendf(&sql, 
           " AND event.mtime>=%.17g AND event.mtime<=%.17g"
           " ORDER BY event.mtime ASC", rAfter-ONE_SECOND, rBefore+ONE_SECOND);
        url_add_parameter(&url, "a", zAfter);
        url_add_parameter(&url, "b", zBefore);
        nEntry = 1000000;
      }else{
        blob_appendf(&sql, 
           " AND event.mtime>=%.17g  ORDER BY event.mtime ASC",
           rAfter-ONE_SECOND);
        url_add_parameter(&url, "a", zAfter);
      }
    }else if( rBefore>0.0 ){


      blob_appendf(&sql, 

         " AND event.mtime<=%.17g ORDER BY event.mtime DESC",
         rBefore+ONE_SECOND);
      url_add_parameter(&url, "b", zBefore);



    }else if( rCirca>0.0 ){



      Blob sql2;
      blob_init(&sql2, blob_str(&sql), -1);
      blob_appendf(&sql2,
          " AND event.mtime<=%f ORDER BY event.mtime DESC LIMIT %d",
          rCirca, (nEntry+1)/2
      );
      db_multi_exec("%s", blob_str(&sql2));
      blob_reset(&sql2);
      blob_appendf(&sql,
          " AND event.mtime>=%f ORDER BY event.mtime ASC",
          rCirca
      );
      nEntry -= (nEntry+1)/2;
      if( useDividers ) timeline_add_dividers(rCirca, 0);
      url_add_parameter(&url, "c", zCirca);



    }else{
      blob_appendf(&sql, " ORDER BY event.mtime DESC");
    }
    blob_appendf(&sql, " LIMIT %d", nEntry);
    db_multi_exec("%s", blob_str(&sql));

    n = db_int(0, "SELECT count(*) FROM timeline /*scan*/");



    if( zAfter==0 && zBefore==0 && zCirca==0 ){
      blob_appendf(&desc, "%d most recent %ss", n, zEType);
    }else{
      blob_appendf(&desc, "%d %ss", n, zEType);
    }
    if( zUser ){
      blob_appendf(&desc, " by user %h", zUser);
      tmFlags |= TIMELINE_DISJOINT;
    }
    if( zTagName ){
      blob_appendf(&desc, " tagged with \"%h\"", zTagName);
      tmFlags |= TIMELINE_DISJOINT;
    }else if( zBrName ){
      blob_appendf(&desc, " related to \"%h\"", zBrName);
      tmFlags |= TIMELINE_DISJOINT;
    }
    if( rAfter>0.0 ){
      if( rBefore>0.0 ){
        blob_appendf(&desc, " occurring between %h and %h.<br>",
                     zAfter, zBefore);
      }else{
        blob_appendf(&desc, " occurring on or after %h.<br />", zAfter);
      }
    }else if( rBefore>0.0 ){
      blob_appendf(&desc, " occurring on or before %h.<br />", zBefore);
    }else if( rCirca>0.0 ){
      blob_appendf(&desc, " occurring around %h.<br />", zCirca);
    }
    if( zSearch ){
      blob_appendf(&desc, " matching \"%h\"", zSearch);
    }
    if( g.perm.Hyperlink ){
      if( zAfter || n==nEntry ){