Index: openacs-4/packages/acs-api-browser/www/proc-view.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-api-browser/www/proc-view.tcl,v
diff -u -r1.15 -r1.16
--- openacs-4/packages/acs-api-browser/www/proc-view.tcl	17 Jul 2018 21:15:20 -0000	1.15
+++ openacs-4/packages/acs-api-browser/www/proc-view.tcl	13 Oct 2018 11:40:20 -0000	1.16
@@ -138,7 +138,7 @@
         set documentation [api_proc_documentation -script $proc_index]
     }
 }
-set procViewToggleURL [export_vars -base proc-view [list proc [list source_p [expr {!$source_p}]] version_id]]
+set procViewToggleURL [export_vars -base proc-view -no_empty [list proc [list source_p [expr {!$source_p}]] version_id]]
 set setDefaultURL [export_vars -base set-default [list source_p return_url]]
 
 #