インライン引用記法 (/scrasobox 系統)
https://gyazo.com/a6124bf52e8d58dc4ccb744bc8dd68d4
UserCSS.icon
記法：
[" quote]
code:style.css
.deco-\" {
border-radius: .2em; padding: 0 .4em; background-color: rgba(128,128,128,0.1);
font-size:95%; font-style: italic }
.deco-\"::before {
color: #a0a0a0; font-size:85%; font-family: 'Font Awesome 5 Free'; font-weight: 900; content: '\f10d'; vertical-align: super }