Please don't print the header before input is seen

[FauxFaux]

hexyl appears to print the "header" (the top of the box) too soon.

If you have an app that thinks before printing output (e.g. gpg), it is unnecessarily ugly.

Something like this:

% (echo Er... >&2; sleep 0.2; \
 echo Thinking... >&2; sleep 0.2; \
 echo Um... >&2; sleep 0.2; \
 echo Output, finally; \
 echo 'Done!' >&2) | hexyl

Typically (it's racy!) looks like:

Er...
┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐
Thinking...
Um...
Done!
│00000000│ 4f 75 74 70 75 74 2c 20 ┊ 66 69 6e 61 6c 6c 79 0a │Output, ┊finally_│
└────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘

I'd rather it showed:

Er...
Thinking...
Um...
┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐
│00000000│ 4f 75 74 70 75 74 2c 20 ┊ 66 69 6e 61 6c 6c 79 0a │Output, ┊finally_│
└────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘
Done!

Gaming the thinking is probably easy. Gaming the Done! is probably impossible. (gpg doesn't print the done.)

[sharkdp]

Sounds good to me.

[sharkdp]

Fixed by @mziter in #51.