app/views/map_mailer/invite_to_edit.html.erb
<% map = @map || map %>
<% inviter = @inviter || inviter %>
<% button_style = "background-color:#4fc059;border-radius:2px;color:white;display:inline-block;font-family:Roboto,Arial,Helvetica,sans-serif;font-size:12px;font-weight:bold;min-height:29px;line-height:29px;min-width:54px;outline:0px;padding:0 8px;text-align:center;text-decoration:none" %>
<p><span style="font-weight: bold;"><%= inviter.name %></span> has invited you to <span style="font-weight: bold">collaboratively edit</span> the following map:</p>
<p><%= link_to map.name, map_url(map), style: "font-size: 18px; text-decoration: none; color: #4fc059;" %></p>
<% if map.desc %>
<p style="font-size: 12px;"><%= map.desc %></p>
<% end %>
<%= link_to 'Go to Map', map_url(map), style: button_style %>