Fix binstubs not being replaced when their quoting style was changed

Author: yhirano55

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## Next release
 
+* Fix binstubs not being replaced when their quoting style was changed (#534)
 * Preserve comments right after the shebang line which might include magic comments such as `frozen_string_literal: true'
 
 ## 2.0.2

lib/spring/client/binstub.rb

@@ -46,11 +46,10 @@ class Binstub < Command
       OLD_BINSTUB = %{if !Process.respond_to?(:fork) || Gem::Specification.find_all_by_name("spring").empty?}
 
       BINSTUB_VARIATIONS = Regexp.union [
-        %{begin\n  load File.expand_path("../spring", __FILE__)\nrescue LoadError\nend\n},
         %{begin\n  load File.expand_path('../spring', __FILE__)\nrescue LoadError\nend\n},
         %{begin\n  spring_bin_path = File.expand_path('../spring', __FILE__)\n  load spring_bin_path\nrescue LoadError => e\n  raise unless e.message.end_with? spring_bin_path, 'spring/binstub'\nend\n},
         LOADER
-      ]
+      ].map { |binstub| /#{Regexp.escape(binstub).gsub("'", "['\"]")}/ }
 
       class Item
         attr_reader :command, :existing

lib/spring/test/acceptance_test.rb

@@ -237,6 +237,9 @@ def exec_name
         assert_success "#{app.spring} binstub --remove rake", stdout: "bin/rake: spring removed"
         assert !app.path("bin/rake").read.include?(Spring::Client::Binstub::LOADER)
         assert_success "bin/rake -T", stdout: "rake db:migrate"
+
+        assert_success "#{app.spring} binstub rake", stdout: "bin/rake: spring inserted"
+        assert app.path("bin/rake").read.include?(Spring::Client::Binstub::LOADER)
       end
 
       test "binstub remove all" do