--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/src/core/collapse.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,3 @@
+function d3_collapse(s) {
+  return s.replace(/(^\s+)|(\s+$)/g, "").replace(/\s+/g, " ");
+}