text: Title: What is ... (more hidden) ...?
  Body: Hi! 
  
  I want to ask what is this for?
  https://github.com/tqdm/tqdm/blob/89ee14464b963ea9ed8dafe64a2dad8586cf9a29/tqdm/std.py#L1467
  I've searched on issues/online and haven't found anything related to this.
  
  I first encountered this when I was running experiment in tmux, and I thought it was tmux that was suppressing output. I tried to search online but couldn't found anything related to it, and turns out the phrase `... (more hidden) ...` comes directly from `tqdm`'s source code.
  
  It became problematic to me because after running my python script for a while (with multiple panels and each script repeating multiple times), most panels starts to show this message, and stops updating (i.e. tmux's panel became blank, no progress bar) even though the script may (or may not) be still running. Once I terminates it (with Ctrl-C) the tmux panel may flush out multiple progress bar that were presents (but never shown in terminal stdout), along with the trackback caused by Ctrl-C.
  
  I am not sure what this line is trying to do, and my problem might as well be tmux's panel being filled by buffer? I just want to understand what this message `... (more hidden) ...` is for.
  
  Thanks! :)
  