Index: openacs-4/packages/acs-templating/tcl/parse-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/parse-procs.tcl,v
diff -u -r1.65.2.21 -r1.65.2.22
--- openacs-4/packages/acs-templating/tcl/parse-procs.tcl	1 Sep 2022 16:04:44 -0000	1.65.2.21
+++ openacs-4/packages/acs-templating/tcl/parse-procs.tcl	5 Sep 2022 15:07:20 -0000	1.65.2.22
@@ -720,7 +720,7 @@
 } {
     #
     #ns_log notice "adp_parse_tags BEGIN [info exists ::template::parse_list]: $HTML"
-    if {[string trim $HTML] eq ""} {
+    if {[string is space $HTML]} {
         return $HTML
     }
     set old_parse_list [expr {[info exists ::template::parse_list] ? $::template::parse_list : ""}]