--- a/Explainer.st	Tue May 03 13:22:02 2016 +0200
+++ b/Explainer.st	Tue May 03 14:59:46 2016 +0200
@@ -14,10 +14,10 @@
 "{ NameSpace: Smalltalk }"
 
 Parser subclass:#Explainer
-        instanceVariableNames:''
-        classVariableNames:''
-        poolDictionaries:''
-        category:'System-Compiler'
+	instanceVariableNames:''
+	classVariableNames:''
+	poolDictionaries:''
+	category:'System-Compiler'
 !
 
 !Explainer class methodsFor:'documentation'!
@@ -1754,17 +1754,19 @@
     expr isMessage ifTrue:[
         msgSelector := expr selector.
         msgReceiver := expr receiver.
-
+            
         msgSelector == #? ifTrue:[
             self addTypeOfExpressionNode:(expr arg1) forAssignmentTo:varName to:setOfTypes.
             ^ self
         ].
         "/ really really only low hanging fruit...
-        ( #(+ - * /) includes:msgSelector ) ifTrue:[
+        "/ ignore / here, because of filename
+        ( #(+ - *) includes:msgSelector ) ifTrue:[
             "/ ignore foo := foo OP expr
             "/ ignore foo := expr OP foo
             (msgReceiver isVariable and:[msgReceiver name = varName]) ifFalse:[
                 (expr arg1 isVariable and:[expr arg1 name = varName]) ifFalse:[
+                    
                     self rememberType:Number in:setOfTypes.
                 ]
             ].