Just a note that whatever script is used to transform _ into := in the
trunk. It does not recognize comments as in

 analyseTempsWithin: scopeBlock "<BlockNode>"  rootNode: rootNode "<MethodNode>"
-       "N.B.  since assigment happens _after_ the value is evaluated
the value is sent the message _first_."
+       "N.B.  since assigment happens :=after:= the value is
evaluated the value is sent the message :=first:=."
       value analyseTempsWithin: scopeBlock rootNode: rootNode.
       variable beingAssignedToAnalyseTempsWithin: scopeBlock rootNode: rootNode

Alex