Replace unsafe usages of str() with utils.unic()
Replace unsafe usages of str() with utils.unic()

ldtri0209/robotframework,ldtri0209/robotframework,waldenner/robotframework,waldenner/robotframework,waldenner/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework,waldenner/robotframework,fiuba08/robotframework,fiuba08/robotframework,ldtri0209/robotframework,fiuba08/robotframework,ldtri0209/robotframework,fiuba08/robotframework