renames SelfSlot to SelfsSlot

in the hope to make a little more distinction

lib/bosl/compiler/field_access.rb

@@ -12,7 +12,7 @@ module Bosl
         index = @clazz.object_layout.variable_index(field_name)
         raise "field access, but no such field:#{field_name} for class #{@clazz.name}" unless index
         value = Virtual::Return.new(:int)
-        @method.source.add_code Virtual::Set.new( Virtual::SelfSlot.new(index, :int ) , value )
+        @method.source.add_code Virtual::Set.new( Virtual::SelfsSlot.new(index, :int ) , value )
       when :message
         #message Slot
         raise "message not yet"

lib/virtual/slots/selfs_slot.rb

@@ -8,12 +8,12 @@ module Virtual
   # (and slots in the next_message by instances of NewSelf)
   #
   # Additionally the current Self is represented as it's own top-level object.
-  # If self is an Object one can refer to it's instance variables as Slots in SelfSlot
+  # If self is an Object one can refer to it's instance variables as Slots in SelfsSlot
   #
-  # In Summary: class Self represents the self object and SelfSlot instances variables of
+  # In Summary: class Self represents the self object and SelfsSlot instances variables of
   #  that object
   #
-  class SelfSlot < Slot
+  class SelfsSlot < Slot
     def initialize index , type , value = nil
       @index = index
       super( type , value )

lib/virtual/slots/slot.rb

@@ -8,7 +8,7 @@ module Virtual
   # Four known objects exist and those correspond to subclasses:
   # - the message that has been received: MessageSlot
   # - the frame of the method that is executing (local variables): FrameSlot
-  # - self as an object: SelfSlot
+  # - self as an object: SelfsSlot
   # - a message that will be sent, NewMessageSlot
 
   # additionally frame, self and return are slots in Message and NewMessage
@@ -41,6 +41,6 @@ module Virtual
 end
 
 require_relative "message_slot"
-require_relative "self_slot"
+require_relative "selfs_slot"
 require_relative "frame_slot"
 require_relative "new_message_slot"