small fix: use bit size terms in compression tutorial
"def format_size(size):\n",
" \"\"\"A helper function for creating a human-readable size.\"\"\"\n",
" size = float(size)\n",
- " for unit in ['B','KiB','MiB','GiB']:\n",
+ " for unit in ['bit','Kibit','Mibit','Gibit']:\n",
" if size \u003c 1024.0:\n",
" return \"{size:3.2f}{unit}\".format(size=size, unit=unit)\n",
" size /= 1024.0\n",
