Index: openacs-4/packages/xowiki/tcl/includelet-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/includelet-procs.tcl,v
diff -u -r1.239.2.9 -r1.239.2.10
--- openacs-4/packages/xowiki/tcl/includelet-procs.tcl	8 May 2019 19:59:56 -0000	1.239.2.9
+++ openacs-4/packages/xowiki/tcl/includelet-procs.tcl	10 May 2019 22:53:10 -0000	1.239.2.10
@@ -737,7 +737,9 @@
       return [:category_tree_missing -name $tree_name -edit_html $edit_html]
     }
 
-    if {![info exists :id]} {set :id [::xowiki::Includelet html_id [self]]}
+    if {![info exists :id]} {
+      set :id [::xowiki::Includelet html_id [self]]
+    }
 
     foreach tree $trees {
       lassign $tree tree_id my_tree_name ...