Add isOnEOL method to cursor

spec/atom/cursor-spec.coffee

@@ -35,3 +35,11 @@ describe "Cursor", ->
       advanceClock(100)
       expect(cursor).toHaveClass 'idle'
 
+  describe ".isOnEOL()", ->
+    it "only returns true when cursor is on the end of a line", ->
+      cursor.setPosition([1,29])
+      expect(cursor.isOnEOL()).toBeFalsy()
+
+      cursor.setPosition([1,30])
+      expect(cursor.isOnEOL()).toBeTruthy()
+

src/atom/cursor.coffee

@@ -38,6 +38,9 @@ class Cursor extends View
   getRow: ->
     @getPosition().row
 
+  isOnEOL: ->
+    @getColumn() == @editor.getCurrentLine().length
+
   moveUp: ->
     { row, column } = @getPosition()
     column = @goalColumn if @goalColumn?