--- a/TSTreeNode.st	Tue Dec 17 17:25:13 2019 +0100
+++ b/TSTreeNode.st	Tue Dec 17 22:34:35 2019 +0100
@@ -1,3 +1,5 @@
+"{ Encoding: utf8 }"
+
 "{ Package: 'stx:libbasic2' }"
 
 "{ NameSpace: Smalltalk }"
@@ -38,9 +40,9 @@
 !
 
 cullNode: aNode
-	low == aNode ifTrue: [^ low _ nil].
-	equal == aNode ifTrue: [^ equal _ nil].
-	high == aNode ifTrue: [^ high _ nil]
+        low == aNode ifTrue: [^ low := nil].
+        equal == aNode ifTrue: [^ equal := nil].
+        high == aNode ifTrue: [^ high := nil]
 !
 
 do: aBlock
@@ -54,7 +56,7 @@
 !
 
 initializeWithKey: aCharacter
-	key _ aCharacter
+        key := aCharacter
 !
 
 lookupString: aString startingAt: i
@@ -152,18 +154,18 @@
 !
 
 removeString: aString startingAt: i
-	| val |
-	self
-		lookupString: aString
-		startingAt: i
-		whenFound: [val _ self value. self value: nil]
-		whenNil: [:c | ^ nil]
-		recurseWith:
-			[:node :j |
-			val _ node removeString: aString startingAt: j.
-			node canBeCulled ifTrue:
-				[self cullNode: node]].
-	^ val
+        | val |
+        self
+                lookupString: aString
+                startingAt: i
+                whenFound: [val := self value. self value: nil]
+                whenNil: [:c | ^ nil]
+                recurseWith:
+                        [:node :j |
+                        val := node removeString:aString startingAt:j.
+                        node canBeCulled ifTrue:
+                                [self cullNode: node]].
+        ^ val
 !
 
 value
@@ -171,7 +173,7 @@
 !
 
 value: anObject
-	value _ anObject
+        value := anObject
 ! !
 
 !TSTreeNode class methodsFor:'documentation'!