Fixing unparenthesized method 'call'.
Fixing unparenthesized method 'call'.

The use of `lower` instead of `lower()` was preventing data download from working.

vahtras/amy,pbanaszkiewicz/amy,vahtras/amy,swcarpentry/amy,pbanaszkiewicz/amy,vahtras/amy,pbanaszkiewicz/amy,swcarpentry/amy,swcarpentry/amy