WorkflowTool.py: fix a typo.

product/ERP5/Tool/WorkflowTool.py

@@ -303,7 +303,7 @@ class WorkflowTool(BaseTool, OriginalWorkflowTool):
             elif tdef.after_script_name in dc_workflow.scripts.objectIds():
               transition.setAfterScriptId(tdef.after_script_name)
           if tdef.script_name is not None:
-            # check after script is a Transion or a Script:
+            # check before script is a Transion or a Script:
             if tdef.script_name in dc_workflow.transitions.objectIds():
               transition.setBeforeScriptId('transition_'+tdef.script_name)
             elif tdef.script_name in dc_workflow.scripts.objectIds():