diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb
index ddb4f3012f..9343bb7106 100644
--- a/activesupport/lib/active_support/core_ext/enumerable.rb
+++ b/activesupport/lib/active_support/core_ext/enumerable.rb
@@ -97,7 +97,7 @@ module Enumerable
   end
 
   # Returns true if the enumerable has more than 1 element. Functionally equivalent to enum.to_a.size > 1.
-  # Can be called with a block too, much like any?, so people.many? { |p| p.age > 26 } returns true if more than 1 person is over 26.
+  # Can be called with a block too, much like any?, so <tt>people.many? { |p| p.age > 26 }</tt> returns true if more than one person is over 26.
   def many?
     cnt = 0
     if block_given?
@@ -110,7 +110,7 @@ module Enumerable
     end
   end
 
-  # The negative of the Enumerable#include?. Returns true if the collection does not include the object.
+  # The negative of the <tt>Enumerable#include?</tt>. Returns true if the collection does not include the object.
   def exclude?(object)
     !include?(object)
   end
diff --git a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
index 0b368fe7b7..f4cb445444 100644
--- a/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
+++ b/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb
@@ -2,7 +2,7 @@ require 'active_support/hash_with_indifferent_access'
 
 class Hash
 
-  # Returns an +ActiveSupport::HashWithIndifferentAccess+ out of its receiver:
+  # Returns an <tt>ActiveSupport::HashWithIndifferentAccess</tt> out of its receiver:
   #
   #   {:a => 1}.with_indifferent_access["a"] # => 1
   #
diff --git a/activesupport/lib/active_support/hash_with_indifferent_access.rb b/activesupport/lib/active_support/hash_with_indifferent_access.rb
index 59ffd24698..636f019cd5 100644
--- a/activesupport/lib/active_support/hash_with_indifferent_access.rb
+++ b/activesupport/lib/active_support/hash_with_indifferent_access.rb
@@ -112,7 +112,7 @@ module ActiveSupport
       end
     end
 
-    # Merges the instantized and the specified hashes together, giving precedence to the values from the second hash
+    # Merges the instantized and the specified hashes together, giving precedence to the values from the second hash.
     # Does not overwrite the existing hash.
     def merge(hash)
       self.dup.update(hash)