4 files changed, 29 insertions, 2 deletions
diff --git a/actionpack/lib/action_view/digestor.rb b/actionpack/lib/action_view/digestor.rb
index cfa864cdd4..58920e1e59 100644
--- a/actionpack/lib/action_view/digestor.rb
+++ b/actionpack/lib/action_view/digestor.rb
@@ -15,9 +15,9 @@ module ActionView
     #   render(topics)         => render("topics/topic")
     #   render(message.topics) => render("topics/topic")
     RENDER_DEPENDENCY = /
-      render\s?                # render, followed by an optional space
+      render\s*                # render, followed by an optional space
       \(?                      # start a optional parenthesis for the render call
-      (partial:)?\s?           # naming the partial, used with collection -- 1st capture
+      (partial:)?\s*           # naming the partial, used with collection -- 1st capture
       ([@a-z"'][@a-z_\/\."']+) # the template name itself -- 2nd capture
     /x
 
diff --git a/actionpack/test/fixtures/digestor/messages/_form.html.erb b/actionpack/test/fixtures/digestor/messages/_form.html.erb
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/actionpack/test/fixtures/digestor/messages/_form.html.erb
diff --git a/actionpack/test/fixtures/digestor/messages/edit.html.erb b/actionpack/test/fixtures/digestor/messages/edit.html.erb
new file mode 100644
index 0000000000..791654ffc9
--- /dev/null
+++ b/actionpack/test/fixtures/digestor/messages/edit.html.erb
@@ -0,0 +1,4 @@
+<%= render              "header" %>
+<%= render    partial:  "form" %>
+<%= render              @message %>
+<%= render ( @message.events ) %>
diff --git a/actionpack/test/template/digestor_test.rb b/actionpack/test/template/digestor_test.rb
index 067ab500f5..dd9bfbca05 100644
--- a/actionpack/test/template/digestor_test.rb
+++ b/actionpack/test/template/digestor_test.rb
@@ -92,6 +92,29 @@ class TemplateDigestorTest < ActionView::TestCase
     end
   end
 
+  def test_extra_whitespace_in_render_partial
+    assert_digest_difference("messages/edit") do
+      change_template("messages/_form")
+    end
+  end
+
+  def test_extra_whitespace_in_render_named_partial
+    assert_digest_difference("messages/edit") do
+      change_template("messages/_header")
+    end
+  end
+
+  def test_extra_whitespace_in_render_record
+    assert_digest_difference("messages/edit") do
+      change_template("messages/_message")
+    end
+  end
+
+  def test_extra_whitespace_in_render_with_parenthesis
+    assert_digest_difference("messages/edit") do
+      change_template("events/_event")
+    end
+  end
 
   private
     def assert_logged(message)