Remove redundant previous_upper = True line.
Remove redundant previous_upper = True line.

Setting previous_upper = True here is unnecessary because there's already a check for `chars[-1] != ' '` when `char not not in ('_', '-')`.

DanLindeman/memegen,DanLindeman/memegen,joshfriend/memegen,DanLindeman/memegen,joshfriend/memegen,CptSpaceToaster/memegen,DanLindeman/memegen,CptSpaceToaster/memegen,joshfriend/memegen,CptSpaceToaster/memegen,joshfriend/memegen