Update prettyPrinting support.

src/Miscellaneous/Fourchan.coffee

@@ -32,13 +32,9 @@ Fourchan =
         cb:   @math
   code: ->
     return if @isClone
-    for pre in $$ '.prettyprint', @nodes.comment
-      # Don't pretty print twice:
-      # Might need a better way to detect if a .prettyprint
-      # is already pretty-printed. We can't just look for spans
-      # since 4chan inserts its quotes and whatnot inside.
-      unless $ '.pln', pre
-        $.event 'prettyprint', pre, window
+    for pre in $$ '.prettyprint:not(.prettyprinted)', @nodes.comment
+      $.event 'prettyprint', pre, window
+      $.addClass pre, 'prettyprinted'
     return
   math: ->
     return if @isClone or !$ '.math', @nodes.comment

src/Quotelinks/Quotify.coffee

@@ -15,7 +15,7 @@ Quotify =
     return
 
   parseDeadlink: (deadlink) ->
-    if deadlink.parentNode.className is 'prettyprint'
+    if $.hasClass deadlink.parentNode, 'prettyprint'
       # Don't quotify deadlinks inside code tags,
       # un-`span` them.
       # This won't be necessary once 4chan