Merge pull request #8218 from DawidJanczak/form-tag-doc

[ci skip] Correct examples for form_tag helper.

Conflicts:
	actionpack/lib/action_view/helpers/form_tag_helper.rb

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -52,7 +52,7 @@ module FormTagHelper
       #   <%= form_tag('/posts') do -%>
       #     <div><%= submit_tag 'Save' %></div>
       #   <% end -%>
-      #   # => <form action="/posts" method="post"><div><input type="submit" name="submit" value="Save" /></div></form>
+      #   # => <form action="/posts" method="post"><div><input type="submit" name="commit" value="Save" /></div></form>
       #
       #   <%= form_tag('/posts', remote: true) %>
       #   # => <form action="/posts" method="post" data-remote="true">