diff --git a/src/Gui/DocumentPyImp.cpp b/src/Gui/DocumentPyImp.cpp
index 535e58dd9..450fca8bd 100644
--- a/src/Gui/DocumentPyImp.cpp
+++ b/src/Gui/DocumentPyImp.cpp
@@ -270,7 +270,7 @@ PyObject* DocumentPy::toggleTreeItem(PyObject *args)
         Gui::ViewProviderDocumentObject* ActiveVp = dynamic_cast<Gui::ViewProviderDocumentObject*> (getDocumentPtr()->getViewProvider(Object)) ;
         switch(mod) {
             case 0: getDocumentPtr()->signalExpandObject(*ActiveVp,Gui::Toggle); break;
-            case 1: getDocumentPtr()->signalExpandObject(*ActiveVp,Gui::Collaps); break;
+            case 1: getDocumentPtr()->signalExpandObject(*ActiveVp,Gui::Collapse); break;
             case 2: getDocumentPtr()->signalExpandObject(*ActiveVp,Gui::Expand); break;
         }
     }
@@ -278,7 +278,6 @@ PyObject* DocumentPy::toggleTreeItem(PyObject *args)
     Py_Return;
 }
 
-
 Py::Object DocumentPy::getActiveObject(void) const
 {
     App::DocumentObject *object = getDocumentPtr()->getDocument()->getActiveObject();
diff --git a/src/Gui/Tree.cpp b/src/Gui/Tree.cpp
index 67190c4fe..4faa227fd 100644
--- a/src/Gui/Tree.cpp
+++ b/src/Gui/Tree.cpp
@@ -893,7 +893,6 @@ void DocumentItem::slotActiveObject(const Gui::ViewProviderDocumentObject& obj)
 
 void DocumentItem::slotHighlightObject (const Gui::ViewProviderDocumentObject& obj,const Gui::HighlightMode& high,bool set)
 {
-
     std::string objectName = obj.getObject()->getNameInDocument();
     std::map<std::string, DocumentObjectItem*>::iterator jt = ObjectMap.find(objectName);
     if (jt == ObjectMap.end())
@@ -915,27 +914,26 @@ void DocumentItem::slotHighlightObject (const Gui::ViewProviderDocumentObject& o
         // not defined enum
         assert(0);
     }
+
     jt->second->setFont(0,f);
-        
 }
 
 void DocumentItem::slotExpandObject (const Gui::ViewProviderDocumentObject& obj,const Gui::TreeItemMode& mode)
 {
-
     std::string objectName = obj.getObject()->getNameInDocument();
     std::map<std::string, DocumentObjectItem*>::iterator jt = ObjectMap.find(objectName);
     if (jt == ObjectMap.end())
         return; // signal is emitted before the item gets created
 
     switch (mode) {
-    case Gui::Expand: 
+    case Gui::Expand:
         jt->second->setExpanded(true);
         break;
-    case Gui::Collaps:  
+    case Gui::Collapse:
         jt->second->setExpanded(false);
         break;
-    case Gui::Toggle:  
-        if(jt->second->isExpanded())
+    case Gui::Toggle:
+        if (jt->second->isExpanded())
             jt->second->setExpanded(false);
         else
             jt->second->setExpanded(true);
@@ -945,10 +943,8 @@ void DocumentItem::slotExpandObject (const Gui::ViewProviderDocumentObject& obj,
         // not defined enum
         assert(0);
     }
-        
 }
 
-
 const Gui::Document* DocumentItem::document() const
 {
     return this->pDocument;
diff --git a/src/Gui/Tree.h b/src/Gui/Tree.h
index 4e616daa5..be1126d6e 100644
--- a/src/Gui/Tree.h
+++ b/src/Gui/Tree.h
@@ -49,8 +49,8 @@ enum HighlightMode {    Underlined,
 
 /// highlight modes for the tree items
 enum TreeItemMode {  Expand,
-                     Collaps,
-                     Toggle    
+                     Collapse,
+                     Toggle
 };