--- a/ByteArray.st	Sun Jun 09 14:57:37 2019 +0200
+++ b/ByteArray.st	Sun Jun 09 14:58:10 2019 +0200
@@ -167,8 +167,6 @@
 
 
 
-
-
 !ByteArray class methodsFor:'queries'!
 
 elementByteSize
@@ -204,8 +202,6 @@
 ! !
 
 
-
-
 !ByteArray methodsFor:'Compatibility-Squeak'!
 
 bitXor:aByteArray
@@ -1249,8 +1245,10 @@
 !
 
 beSigned
-    "make mayself signed.
-     elements > 127 are converted to negative numbers."
+    "destructively make mayself signed.
+     elements > 127 are converted to negative numbers.
+     WARNING: this changes the receiver itself 
+     - use this only for initialization of new instances"
 
     self class == ByteArray ifTrue:[
         self changeClassTo:SignedByteArray.
@@ -1259,8 +1257,11 @@
     ].
 
     "
-        #[ 1 2 3 128 255] copy beSigned
+     #[ 1 2 3 128 255 ] copy beSigned
+     #[ 1 2 3 128 255 ] beImmutable beSigned
     "
+
+    "Modified: / 09-06-2019 / 14:57:56 / Claus Gittinger"
 !
 
 beUnsigned
@@ -1272,8 +1273,10 @@
     self shouldNotImplement.
 
     "
-        #[ 1 2 3 128 255] copy beUnsigned
+     #[ 1 2 3 128 255 ] copy beUnsigned
     "
+
+    "Modified (comment): / 09-06-2019 / 14:52:12 / Claus Gittinger"
 !
 
 decodeAsLiteralArray
@@ -3297,7 +3300,6 @@
     "Modified: 22.4.1996 / 12:55:30 / cg"
 ! !
 
-
 !ByteArray class methodsFor:'documentation'!
 
 version