Make wording of "integer" lower-case. Upper-case may suggest Integer object.
Make wording of "integer" lower-case. Upper-case may suggest Integer object.

Signed-off-by: Krzysztof Wilczynski <9bf091559fc98493329f7d619638c79e91ccf029@linux.com>

kwilczynski/ruby-fizzbuzz,kwilczynski/ruby-fizzbuzz,kwilczynski/ruby-fizzbuzz