Wrap float environment on writing literal_block to latex

--HG--
extra : transplant_source : %3B%2B%29%09%3Au%83%A9%ADX%B3%B5j%0D%2B%D8%97%01%E8%A0
extra : histedit_source : 0ce2d301629d50fd866746e4152615f794bb37e5%2C284330e990bcd7a0f86ced5c8ef13edbc4a7ada6
Merge with default