Improve copy for enabling 2FA

app/views/profiles/accounts/show.html.haml

@@ -47,9 +47,10 @@
         %legend Two-factor Authentication
         %div
           %p
-            Keep your account secure by enabling two-factor authentication.
-            %br
-            Each time you log in, you’ll be required to provide your password plus a randomly generated access code.
+            Increase your account's security by enabling two-factor authentication (2FA).
+          %p
+            Each time you log in you’ll be required to provide your username and
+            password as usual, plus a randomly-generated code from your phone.
           %div
             = link_to "Enable Two-factor Authentication", new_profile_two_factor_auth_path, class: 'btn btn-success'
 

app/views/profiles/two_factor_auths/new.html.haml

 - page_title 'Two-factor Authentication', 'Account'
 
-%h2.page-title Two-Factor Authentication (TFA)
+%h2.page-title Two-Factor Authentication (2FA)
 %p
   Download the Google Authenticator application from App Store for iOS or
   Google Play for Android and scan this code.