correct.fasta

>3HMX:A|PDBID|CHAIN|SEQUENCE
IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSE
VLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLL

>7HMX:A|PDBID|CHAIN|SEQUENCE
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
VLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLL

> With_spaces 
MDFFDLDIEI KQERLPAECS LNSPLNYSLS AQLTDRMTPR TENVRRQRER
MDFFDLDIEI KQERLPAECS LNSPLNYSLS AQLTDRMTPR TENVRRQRER

MDFFDLDIEI KQERLPAECS LNSPLNYSLS AQLTDRMTPR TENVRRQRER

> Empty_ha_ha_ha