Use non-breakable spaces to indent categories in getIndentedTitle.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25677 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/CMFCategory/Category.py

@@ -45,6 +45,8 @@ DEFAULT_CACHE_FACTORY = 'erp5_ui_long'
 
 from zLOG import LOG
 
+NBSP_UTF8 = u'\xA0'.encode('utf-8')
+
 manage_addCategoryForm=DTMLFile('dtml/category_add', globals())
 
 def addCategory( self, id, title='', REQUEST=None ):
@@ -216,7 +218,7 @@ class Category(Folder):
       logical_title_list = []
 
       if path_len >= 2:
-        logical_title_list.append(' ' * 4 * (path_len - 1))
+        logical_title_list.append(NBSP_UTF8 * 4 * (path_len - 1))
 
       logical_title = getattr(self, item_method)()
       if logical_title in [None, '']: