[rulers addon] Draw rulers all the way when scrollPastEnd is on.

Author: alur

addon/display/rulers.js

@@ -13,12 +13,12 @@
 
   CodeMirror.defineOption("rulers", false, function(cm, val) {
     if (cm.state.rulerDiv) {
-      cm.display.lineSpace.removeChild(cm.state.rulerDiv)
+      cm.state.rulerDiv.parentElement.removeChild(cm.state.rulerDiv)
       cm.state.rulerDiv = null
       cm.off("refresh", drawRulers)
     }
     if (val && val.length) {
-      cm.state.rulerDiv = cm.display.lineSpace.insertBefore(document.createElement("div"), cm.display.cursorDiv)
+      cm.state.rulerDiv = cm.display.lineSpace.parentElement.insertBefore(document.createElement("div"), cm.display.lineSpace)
       cm.state.rulerDiv.className = "CodeMirror-rulers"
       drawRulers(cm)
       cm.on("refresh", drawRulers)