Comment typo (missing i).

lib/msf/core/encoder.rb

@@ -435,7 +435,7 @@ class Encoder < Module
   end
 
   #
-  # The amount of space available to the encoder, whch may be nil,
+  # The amount of space available to the encoder, which may be nil,
   # indicating that the smallest possible encoding should be used.
   #
   attr_accessor :available_space

lib/msf/core/payload.rb

@@ -501,7 +501,7 @@ class Payload < Msf::Module
   attr_accessor :assoc_exploit
 
   #
-  # The amount of space available to the payload, whch may be nil,
+  # The amount of space available to the payload, which may be nil,
   # indicating that the smallest possible payload should be used.
   #
   attr_accessor :available_space