WordPress/wp-content/themes/twentytwelve/editor-style-rtl.css

/*
Theme Name: Twenty Twelve

Used to style the TinyMCE editor for RTL languages.
See also rtl.css
*/

html .mceContentBody {
	direction: rtl;
	unicode-bidi: embed;
	margin: 10px auto;
}
li {
	margin: 0 24px 0 0;
	margin: 0 1.714285714rem 0 0;
}
td {
	text-align: right;
}
.wp-caption-dd {
	padding-right: 10px;
	text-align: right;
}