.token.tab:not(:empty), .token.cr, .token.lf, .token.space { position: relative; } .token.tab:not(:empty):before, .token.cr:before, .token.lf:before, .token.space:before { color: #808080; opacity: 0.6; position: absolute; } .token.tab:not(:empty):before { content: '\21E5'; } .token.cr:before { content: '\240D'; } .token.crlf:before { content: '\240D\240A'; } .token.lf:before { content: '\240A'; } .token.space:before { content: '\00B7'; }