Whitelist basic
read-only

Allow only basic text tags.

The following tags are allowed: a, b, blockquote, br, cite, code, em, dd, dl, dt, i, kbd, li, ol, p, pre, q, samp, small, span, strike, strong, sub, sup, u, ul and var.

blockquote and q allow the cite attribute.

a allows the href attribute, and will add rel="nofollow" for href values that do not start with a # symbol.