Fixed typo using dumpDifference (#323).
Fixed typo using dumpDifference (#323).

ashigeru/asakusafw,akirakw/asakusafw,cocoatomo/asakusafw,ashigeru/asakusafw,asakusafw/asakusafw,cocoatomo/asakusafw,asakusafw/asakusafw,akirakw/asakusafw