Fixed minor typos in inline documentation for assign and capture

lib/liquid/tags/assign.rb

@@ -6,7 +6,7 @@ module Liquid
   #
   # You can then use the variable later in the page.
   #
-  #  {{ monkey }}
+  #  {{ foo }}
   #
   class Assign < Tag
     Syntax = /(#{VariableSignature}+)\s*=\s*(#{QuotedFragment}+)/   

lib/liquid/tags/capture.rb

@@ -6,7 +6,7 @@ module Liquid
   #     Monkeys!
   #   {% endcapture %}
   #   ...
-  #   <h1>{{ monkeys }}</h1>
+  #   <h1>{{ heading }}</h1>
   #
   # Capture is useful for saving content for use later in your template, such as
   # in a sidebar or footer.