expose regexp escape problem in fill_in_test

spec/integration/rails/app/views/fields/show.html.erb

@@ -5,4 +5,5 @@
 	<li><input type="text" name="rails[naming]" value="" /></li>
 	<li><input type="text" id="field_by_id" value="" /></li>
 	<li><label for="field_by_label_id">FieldByLabelId</label><input type="text" id="field_by_label_id" /></li>
+	<li><label for="field_by_label_with_special_characters">[Field]:</label><input type="text" id="field_by_label_with_special_characters" /></li>
 </ul>

spec/integration/rails/test/integration/fill_in_test.rb

@@ -17,4 +17,8 @@ class FillInTest < ActionController::IntegrationTest
     visit fields_path
     fill_in "FieldByLabelId", :with => "value"
   end
+  test "should fill in text field by label with special characters" do
+    visit fields_path
+    fill_in "[Field]:", :with => "value"
+  end
 end