Fix markup in RDoc [ci skip]

Author: kamipo

actionview/lib/action_view/helpers/form_helper.rb

@@ -1408,7 +1408,7 @@ def date_field(object_name, method, options = {})
       # Returns a text_field of type "time".
       #
       # The default value is generated by trying to call +strftime+ with "%T.%L"
-      # on the object's value. If you pass "include_seconds: false", it will be
+      # on the object's value. If you pass <tt>include_seconds: false</tt>, it will be
       # formatted by trying to call +strftime+ with "%H:%M" on the object's value.
       # It is also possible to override this by passing the "value" option.
       #
@@ -1432,7 +1432,7 @@ def date_field(object_name, method, options = {})
       #   # => <input id="task_started_at" name="task[started_at]" type="time" min="01:00:00.000" />
       #
       # By default, provided times will be formatted including seconds. You can render just the hour
-      # and minute by passing `include_seconds: false`. Some browsers will render a simpler UI
+      # and minute by passing <tt>include_seconds: false</tt>. Some browsers will render a simpler UI
       # if you exclude seconds in the timestamp format.
       #
       #   time_field("task", "started_at", value: Time.now, include_seconds: false)