exceptions.rb in rubygems-update-2.5.2

- old
+ new

@@ -1,5 +1,6 @@
+# frozen_string_literal: true
 # TODO: the documentation in here is terrible.
 #
 # Each exception needs a brief description and the scenarios where it is
 # likely to be raised
 
@@ -135,11 +136,11 @@
   def build_message # :nodoc:
     requester  = @request.requester
     requester  = requester ? requester.spec.full_name : 'The user'
     dependency = @request.dependency
 
-    message = "#{requester} requires #{dependency} but it conflicted:\n"
+    message = "#{requester} requires #{dependency} but it conflicted:\n".dup
 
     @conflicts.each do |_, conflict|
       message << conflict.explanation
     end
 
@@ -265,6 +266,5 @@
 
 ##
 # Backwards compatible typo'd exception class for early RubyGems 2.0.x
 
 Gem::UnsatisfiableDepedencyError = Gem::UnsatisfiableDependencyError # :nodoc:
-