Document that we expect text, not bytes.
Document that we expect text, not bytes.

timothycrosley/frosted_original_fork,hugovk/frosted,saper/main-pyflakes,janusnic/main-pyflakes,epsy/pyflakes,timothycrosley/frosted,jayvdb/pyflakes,pyflakes/pyflakes,bitglue/pyflakes,asmeurer/pyflakes,nikolas/pyflakes,PyCQA/pyflakes,timothycrosley/frosted,mattcaldwell/frosted,hugovk/frosted