Fix letter opener; tweak ticket display

Gemfile

@@ -231,6 +231,8 @@ group :development do
   gem 'rubocop-rspec'
   # to open mails
   gem 'letter_opener'
+  # view mail at /letter_opener/
+  gem 'letter_opener_web', '~> 1.0'
   # as deployment system
   gem 'mina'
   # as debugger on error pages

Gemfile.lock

@@ -260,6 +260,10 @@ GEM
       rails (>= 4.2.0)
     letter_opener (1.7.0)
       launchy (~> 2.2)
+    letter_opener_web (1.4.0)
+      actionmailer (>= 3.2)
+      letter_opener (~> 1.0)
+      railties (>= 3.2)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -654,6 +658,7 @@ DEPENDENCIES
   json-schema
   leaflet-rails
   letter_opener
+  letter_opener_web (~> 1.0)
   mina
   mini_magick
   money-rails

app/views/conferences/_tickets.haml

@@ -20,7 +20,7 @@
                 %h3.text-center.word_break
                   = ticket.title
                 .word_break
-                  = markdown(ticket.description)
+                  = markdown(ticket.description.split('\n').first)
                 %button.btn-block.btn.btn-lg.btn-success
                   %i.fa.fa-ticket.fa-fw{"aria-hidden": true}
                   = humanized_money_with_symbol(ticket.price)

config/routes.rb

@@ -1,5 +1,7 @@
 Osem::Application.routes.draw do
 
+  mount LetterOpenerWeb::Engine, at: "/letter_opener" if Rails.env.development?
+
   constraints DomainConstraint do
     get '/', to: 'conferences#show'
   end