From 28ed6ae74d0185bea22e65acf6b53c650725d9d8 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Fri, 27 Jun 2014 19:09:26 -0400
Subject: [PATCH] Task
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- Now recognizeѕ '', "" and <blank> as examples of an attribute values that
  should be cleared.
---
 src/Task.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Task.cpp b/src/Task.cpp
index f4c691193..32b104188 100644
--- a/src/Task.cpp
+++ b/src/Task.cpp
@@ -1956,7 +1956,9 @@ void Task::modify (modType type, bool text_required /* = false */)
         // 'value' requires eval.
         std::string name  = (*i)->attribute ("name");
         std::string value = (*i)->attribute ("raw");
-        if (value == "")
+        if (value == ""     ||
+            value == "''"   ||
+            value == "\"\"")
         {
           // Remove attribute if the value is blank.
           (*this).remove (name);