Let application_id also respect RUBY_VERSION for the use case of switching between Ruby versions for a given Rails app

Author: methodmissing

CHANGELOG.md

@@ -6,6 +6,7 @@
   snippet of code inserted into generated binstubs just after Spring is
   set up. #329 - @merhard
 * Change monkey-patched `Kernel.raise` from public to private (to match default Ruby behavior) #351 - @mattbrictson
+* Let application_id also respect RUBY_VERSION for the use case of switching between Ruby versions for a given Rails app - @methodmissing
 
 ## 1.1.3
 

lib/spring/env.rb

@@ -38,7 +38,7 @@ def tmp_path
     end
 
     def application_id
-      Digest::MD5.hexdigest(project_root.to_s)
+      Digest::MD5.hexdigest(RUBY_VERSION + project_root.to_s)
     end
 
     def socket_path