Base cursor visibility on marker emptiness instead of tail status

src/app/buffer-marker.coffee

@@ -27,8 +27,8 @@ class BufferMarker
   isReversed: ->
     @tailPosition? and @headPosition.isLessThan(@tailPosition)
 
-  hasTail: ->
-    @tailPosition?
+  isRangeEmpty: ->
+    @getHeadPosition().isEqual(@getTailPosition())
 
   getRange: ->
     if @tailPosition

src/app/cursor.coffee

@@ -61,7 +61,7 @@ class Cursor
       @trigger 'autoscrolled' if @needsAutoscroll
 
   updateVisibility: ->
-    @setVisible(not @editSession.doesMarkerHaveTail(@marker))
+    @setVisible(@editSession.isMarkerRangeEmpty(@marker))
 
   setVisible: (visible) ->
     if @visible != visible

src/app/display-buffer.coffee

@@ -400,8 +400,8 @@ class DisplayBuffer
   isMarkerReversed: (id) ->
     @buffer.isMarkerReversed(id)
 
-  doesMarkerHaveTail: (id) ->
-    @buffer.doesMarkerHaveTail(id)
+  isMarkerRangeEmpty: (id) ->
+    @buffer.isMarkerRangeEmpty(id)
 
   observeMarker: (id, callback) ->
     @getMarker(id).observe(callback)

src/app/edit-session.coffee

@@ -556,8 +556,8 @@ class EditSession
   isMarkerReversed: (args...) ->
     @displayBuffer.isMarkerReversed(args...)
 
-  doesMarkerHaveTail: (args...) ->
-    @displayBuffer.doesMarkerHaveTail(args...)
+  isMarkerRangeEmpty: (args...) ->
+    @displayBuffer.isMarkerRangeEmpty(args...)
 
   hasMultipleCursors: ->
     @getCursors().length > 1

src/app/text-buffer.coffee

@@ -339,8 +339,8 @@ class Buffer
   isMarkerReversed: (id) ->
     @validMarkers[id]?.isReversed()
 
-  doesMarkerHaveTail: (id) ->
-    @validMarkers[id]?.hasTail()
+  isMarkerRangeEmpty: (id) ->
+    @validMarkers[id]?.isRangeEmpty()
 
   observeMarker: (id, callback) ->
     @validMarkers[id]?.observe(callback)