Index: openacs-4/packages/forums/lib/search/search-chunk.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/forums/lib/search/search-chunk.tcl,v
diff -u -N -r1.14 -r1.14.2.1
--- openacs-4/packages/forums/lib/search/search-chunk.tcl	26 Jun 2018 10:39:02 -0000	1.14
+++ openacs-4/packages/forums/lib/search/search-chunk.tcl	1 Feb 2021 11:01:48 -0000	1.14.2.1
@@ -19,10 +19,10 @@
 
         # remove any special characters from the search text so we
         # don't crash interMedia
-        regsub -all {[^[:alnum:]_[:blank:]]} $search_text {} search_text
+        regsub -all -- {[^[:alnum:]_[:blank:]]} $search_text {} search_text
 
         # replace subsequent spaces
-        regsub -all {\s+} $search_text " " search_text
+        regsub -all -- {\s+} $search_text " " search_text
         set search_text [string trim $search_text]
 
         # don't search for empty search strings