Use backslash to escape multiple markdown sign will display incorrect.

Current behavior

At JSCode at jsx file or md file, it will display incorrect if use multiple backslash to escape multiple underscore at a variable.

To reproduce

At Jsx file:

/**  
 * a\_b\_c\_d  
 */  
const MyComponent = () => {};
export MyComponent;

At md file

a\_b\_c\_d

Both result at react-styleguidist:

<p class="rsg--para-40">a<em class="rsg--text-52 rsg--inheritSize-53 rsg--baseColor-57 rsg--em-59">b</em>c_d</p>

Expected behavior

<p class="rsg--para-40">a_b_c_d</p>