<%= form_tag [:admin, :search], class: 'search-inline search-petitions', method: 'get' do %>
  <%= label_tag :q, "Search all petitions", class: "visuallyhidden" %>
  <%= search_field_tag 'q', query, class: 'form-control', placeholder:"Keywords, name, email address, petition ID or [tag]" %>
  <%= submit_tag 'Search', class: 'inline-submit' %>
<% end %>

<%= form_tag [:admin, :search], class: 'search-inline search-petitions', method: 'get' do %>
  <%= label_tag :q, "Search all petitions", class: "visuallyhidden" %>
  <%= search_field_tag 'q', query, class: 'form-control', placeholder:"Keywords, name, email address, IP address, petition ID or [tag]" %>
  <%= submit_tag 'Search', class: 'inline-submit' %>
<% end %>

Add 'IP address' to the placeholder text
Add 'IP address' to the placeholder text
