Typo in readme leads to error in .beddb generations, Fails to write chrom sizes from gff

Hello! I am using an annotation file provided by assembly authors in .gff format (available [here](https://figshare.com/ndownloader/files/21711597)), but the chrom.sizes file generated by first command of example two is empty.
.hgbed is created fine.
I also wish to report a misprint in readme.md, which leads to this:
Even if I make a chrom.sizes file from .fa sequence file of the whole genome and provide it for the third command, the resulting .beddb file is only 44 kb large and contains no records.
It can be fixed by changing the ` in front of the \t to '