--- a/Collection.st	Mon Aug 26 09:57:17 2019 +0200
+++ b/Collection.st	Mon Aug 26 10:01:42 2019 +0200
@@ -3151,7 +3151,7 @@
 
     <resource: #obsolete>
     self obsoleteMethodWarning:'use #do:separatedBy:'.
-    ^ self do:aBlock separatedBy:betweenBlock
+    self do:aBlock separatedBy:betweenBlock
 
     "Modified: / 11.2.2000 / 11:23:15 / cg"
 !
@@ -3268,7 +3268,8 @@
 do:aBlock whileTrue:whileBlock
     "evaluate the argument, aBlock for each element until whileBlock
      evaluates to false.
-     Answer the last result from evaluating aBlock."
+     Answer the last result from evaluating aBlock,
+     or nil if none returned true."
 
     |result|
 
@@ -3293,7 +3294,8 @@
 !
 
 do:aBlock without:anItem
-    "enumerate all elements except those equal to anItem into aBlock."
+    "enumerate all elements except those equal to anItem into aBlock.
+     Return the receiver"
 
     self do:[:el |
         anItem ~= el ifTrue:[ aBlock value:el ]
@@ -3312,9 +3314,10 @@
 doIfNotNil:aBlock
     "if I am a collection, then enumerate myself into aBlock.
      if I am nil, then do nothing.
+     Return the receiver.
      Otherwise, evaluate aBlock with myself as argument."
 
-    ^ self do:aBlock
+    self do:aBlock
 
     "Created: / 20-03-2018 / 15:37:29 / stefan"
     "Modified (comment): / 05-08-2018 / 11:26:46 / Claus Gittinger"
@@ -3386,6 +3389,7 @@
     "evaluate the argument, aBlock for each element.
      Passes an additional exit object, which can be used to leave
      the loop early, by sending it a #value message.
+     Returns nil if exited early, the receiver otherwise.
 
      Notice, that this is different to a return statement in the block, 
      which returns from the enclosed method, NOT only from the block."