Append confirmation link as plain text (#5146)

* Append confirmation link as plain text

Some mail application is malfunctioning with links.

* Change description text

app/views/user_mailer/confirmation_instructions.en.html.erb

@@ -2,11 +2,14 @@
 
 <p>You just created an account on <%= @instance %>.</p>
 
-<p>To confirm your inscription, please click on the following link : <br>
-<%= link_to 'Confirm my account', confirmation_url(@resource, confirmation_token: @token) %>
+<p>If the above link did not work, copy and paste this URL into your address bar: <br>
+<%= link_to 'Confirm my account', confirmation_url(@resource, confirmation_token: @token) %></p>
+
+<p>If above link not worked, Copy and paste this URL</p>
+<span><%= confirmation_url(@resource, confirmation_token: @token) %></span>
 
 <p>Please also check out our <%= link_to 'terms and conditions', terms_url %>.</p>
 
 <p>Sincerely,<p>
 
-<p>The <%= @instance %> team</p>
+<p>The <%= @instance %> team</p>