diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 74904e3d45..7459dd4ff3 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -2038,8 +2038,8 @@ module ActionDispatch
         #     { controller: "pages", action: "index", subdomain: "www" }
         #   end
         #
-        # The return value from the block passed to `direct` must be a valid set of
-        # arguments for `url_for` which will actually build the URL string. This can
+        # The return value from the block passed to +direct+ must be a valid set of
+        # arguments for +url_for+ which will actually build the URL string. This can
         # be one of the following:
         #
         #   * A string, which is treated as a generated URL
@@ -2058,17 +2058,17 @@ module ActionDispatch
         #     [ :products, options.merge(params.permit(:page, :size).to_h.symbolize_keys) ]
         #   end
         #
-        # In this instance the `params` object comes from the context in which the the
+        # In this instance the +params+ object comes from the context in which the the
         # block is executed, e.g. generating a URL inside a controller action or a view.
         # If the block is executed where there isn't a params object such as this:
         #
         #   Rails.application.routes.url_helpers.browse_path
         #
-        # then it will raise a `NameError`. Because of this you need to be aware of the
+        # then it will raise a +NameError+. Because of this you need to be aware of the
         # context in which you will use your custom URL helper when defining it.
         #
-        # NOTE: The `direct` method can't be used inside of a scope block such as
-        # `namespace` or `scope` and will raise an error if it detects that it is.
+        # NOTE: The +direct+ method can't be used inside of a scope block such as
+        # +namespace+ or +scope+ and will raise an error if it detects that it is.
         def direct(name, options = {}, &block)
           unless @scope.root?
             raise RuntimeError, "The direct method can't be used inside a routes scope block"
@@ -2078,8 +2078,8 @@ module ActionDispatch
         end
 
         # Define custom polymorphic mappings of models to URLs. This alters the
-        # behavior of `polymorphic_url` and consequently the behavior of
-        # `link_to` and `form_for` when passed a model instance, e.g:
+        # behavior of +polymorphic_url+ and consequently the behavior of
+        # +link_to+ and +form_for+ when passed a model instance, e.g:
         #
         #   resource :basket
         #
@@ -2087,8 +2087,8 @@ module ActionDispatch
         #     [:basket]
         #   end
         #
-        # This will now generate "/basket" when a `Basket` instance is passed to
-        # `link_to` or `form_for` instead of the standard "/baskets/:id".
+        # This will now generate "/basket" when a +Basket+ instance is passed to
+        # +link_to+ or +form_for+ instead of the standard "/baskets/:id".
         #
         # NOTE: This custom behavior only applies to simple polymorphic URLs where
         # a single model instance is passed and not more complicated forms, e.g:
@@ -2105,7 +2105,7 @@ module ActionDispatch
         #   link_to "Profile", @current_user
         #   link_to "Profile", [:admin, @current_user]
         #
-        # The first `link_to` will generate "/profile" but the second will generate
+        # The first +link_to+ will generate "/profile" but the second will generate
         # the standard polymorphic URL of "/admin/users/1".
         #
         # You can pass options to a polymorphic mapping - the arity for the block
@@ -2116,11 +2116,11 @@ module ActionDispatch
         #   end
         #
         # This generates the URL "/basket#items" because when the last item in an
-        # array passed to `polymorphic_url` is a hash then it's treated as options
+        # array passed to +polymorphic_url+ is a hash then it's treated as options
         # to the URL helper that gets called.
         #
-        # NOTE: The `resolve` method can't be used inside of a scope block such as
-        # `namespace` or `scope` and will raise an error if it detects that it is.
+        # NOTE: The +resolve+ method can't be used inside of a scope block such as
+        # +namespace+ or +scope+ and will raise an error if it detects that it is.
         def resolve(*args, &block)
           unless @scope.root?
             raise RuntimeError, "The resolve method can't be used inside a routes scope block"