H86: Providing text alternatives for ASCII art, emoticons, and leetspeak

HTML Snippet	Code
Scenario 1: Alternative text is not provided for an emoticon representing "fright,"
=8-0
Scenario 2: No mechanism to skip ASCII image
Figure 1: ASCII art picture of a butterfly. LLLLLLLLLLL __LLLLLLLLLLLLLL LLLLLLLLLLLLLLLLL _LLLLLLLLLLLLLLLLLL LLLLLLLLLLLLLLLLLLLL _LLLLLLLLLLLLLLLLLLLLL LLLLLLLLLLLLLLLLLLLLLL L _LLLLLLLLLLLLLLLLLLLLLLL LL LLLLLL~~~LLLLLLLLLLLLLL _L _LLLLL LLLLLLLLLLLLL L~ LLL~ LLLLLLLLLLLLL LL _LLL _LL LLLLLLLL LL LL~ ~~ ~LLLLLL L _LLL_LLLL___ _LLLLLL LL LLLLLLLLLLLLLL LLLLLLLL L LLLLLLLLLLLLLLL LLLLLL LL LLLLLLLLLLLLLLLL LLLLL~ LLLLLLLL_______ L _LLLLLLLLLLLLLLLL LLLLLLLL ~~~~~~~LLLLLLLLLLLLLLLLLLLLLLLLL~ LLLLLL ______________LLL LLLLLLLLLLLLLL ______LLLLLLLLL_ LLLLLLLLLLLLLLLLLLLL LLLLLLLL~~LLLLLLL~~~~~~ ~LLLLLL ___LLLLLLLLLL __LLLLLLLLLLLLL LLLLLLLLLLLLL____ _LLLLLL_ LLLLLLLLLLL~~ LLLLLLLLLLLLLLL LLLLLLLLLLLLLLLLLL ~~~LLLLL __LLLLLLLLLLL _LLLLLLLLLLLLLLLLL_ LLLLLLLLLLLLLLLLLL_ LLLLL LLLLLLLLLLL~ LLLLLLLLLLLLLLLLLLL ~L ~~LLLLLLLLLLLLL LLLLLL _LLLLLLLLLLLL LLLLLLLLLLLLLLLLLLLLL_ LL LLLLLLLLL LLLLLLLLL LLLLLLLLLLLLL LLLLLLLLLLLLL~LLLLLL~L LL ~~~~~ ~LLLLLL LLLLLLLLLLLLLLL__L LLLLLLLLLLLL_LLLLLLL LL_ LL_ _ LLLLLL LLLLLLLLLLLLLLLLL~ ~LLLLLLLL~~LLLLLLLL ~L ~LLLL ~L LLLLLL~ LLLLLLLLLLLLLLLL _LLLLLLLLLL LL LLLLLLL___ LLLLLLLLLL LLLLLLLLLLLLLLLL LL~LLLLLLLL~ LL LLLLLLLLLLLL LLLLLLL~ LLLLLLLLLLLLLLLL_ __L _L LLLLLLLL LLL_ LLLLLLLLLLLLLLLLLLLLL LLLLLLLLLLLLLLLLLLLL L~ LLLLLLLL LLLLLLL~LLLLLLLLLLLLLLLL~ LLLLLLLLLLLLLLLLLLLL___L_ LL LLLLLLL LLLL LLLLLLLLLLLLLL ~~LLLLLLLLLLLLLLLLLLLLLLLL LLLLL~ LLLLL ~~~~~~~~~ LLLLLLLLLLLLLLLLLL_ _ LLL _LLLLL ~~~~~~LLLLLLLLLL~ LLLLLL LLLLL _LLLLLL LLLLL L L LLLLLLL LLLLL__LL _L__LLLLLLLL LLLLLLLLLL LLLLLLLLLLLL LLLLLLLLLLLLLLLLLLLLLL ~LLLLLLLLLLLLLLLLL~~ LLLLLLLLLLLLL ~~~~~~~~~