Upgrade spring to 1.3.2 and undo our local patch.

Gemfile

@@ -106,7 +106,7 @@ group :development, :test do
   gem 'rspec-rails', '~> 3.0.1'
   gem 'rspec-html-matchers', '~> 0.6.1'
   gem 'shoulda-matchers'
-  gem 'spring'
+  gem 'spring', '~> 1.3.2'
   gem 'spring-commands-rspec'
   gem 'vcr'
   gem 'webmock', '~> 1.17.4', require: false

Gemfile.lock

@@ -364,7 +364,7 @@ GEM
     slop (3.6.0)
     spectrum-rails (1.3.4)
       railties (>= 3.1)
-    spring (1.1.3)
+    spring (1.3.2)
     spring-commands-rspec (1.0.2)
       spring (>= 0.9.1)
     sprockets (2.11.0)
@@ -517,7 +517,7 @@ DEPENDENCIES
   shoulda-matchers
   slack-notifier (~> 1.0.0)
   spectrum-rails
-  spring
+  spring (~> 1.3.2)
   spring-commands-rspec
   string-scrub
   therubyracer (~> 0.12.1)

bin/spring

@@ -1,20 +1,15 @@
 #!/usr/bin/env ruby
 
-# This file loads spring without using Bundler, in order to be fast
-# It gets overwritten when you run the `spring binstub` command
+# This file loads spring without using Bundler, in order to be fast.
+# It gets overwritten when you run the `spring binstub` command.
 
 unless defined?(Spring)
   require "rubygems"
   require "bundler"
 
-  case lockfile = Bundler.default_lockfile.read
-  when /^GEM$.*?^    spring \((.*?)\)$.*?^$/m
-    version = $1
-    ENV["GEM_PATH"] = ([Bundler.bundle_path.to_s] + Gem.path).join(File::PATH_SEPARATOR)
-    ENV["GEM_HOME"] = "" unless /^GIT$/ === lockfile
-    Gem.paths = ENV
-
-    gem "spring", version
+  if match = Bundler.default_lockfile.read.match(/^GEM$.*?^    (?:  )*spring \((.*?)\)$.*?^$/m)
+    Gem.paths = { "GEM_PATH" => Bundler.bundle_path.to_s }
+    gem "spring", match[1]
     require "spring/binstub"
   end
 end