Backtrace opening quote change in Ruby v3.4

See https://bugs.ruby-lang.org/issues/16495.

lib/mocha/ruby_version.rb

@@ -1,3 +1,4 @@
 module Mocha
   RUBY_V27_PLUS = Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('2.7')
+  RUBY_V34_PLUS = Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('3.4')
 end

test/acceptance/keyword_argument_matching_test.rb

@@ -3,6 +3,7 @@
 require 'deprecation_disabler'
 require 'execution_point'
 require 'mocha/deprecation'
+require 'mocha/ruby_version'
 
 class KeywordArgumentMatchingTest < Mocha::TestCase
   include AcceptanceTest
@@ -24,7 +25,8 @@ def test_should_match_hash_parameter_with_keyword_args
         mock.method({ key: 42 }) # rubocop:disable Style/BracesAroundHashParameters
       end
       if Mocha::RUBY_V27_PLUS
-        location = "#{execution_point.file_name}:#{execution_point.line_number}:in `block in #{test_name}'"
+        opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+        location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}block in #{test_name}'"
         assert_includes Mocha::Deprecation.messages.last, "Expectation defined at #{location} expected keyword arguments (key: 42)"
         assert_includes Mocha::Deprecation.messages.last, 'but received positional hash ({:key => 42})'
       end
@@ -54,7 +56,8 @@ def test_should_match_hash_parameter_with_splatted_keyword_args
         mock.method({ key: 42 }) # rubocop:disable Style/BracesAroundHashParameters
       end
       if Mocha::RUBY_V27_PLUS
-        location = "#{execution_point.file_name}:#{execution_point.line_number}:in `block in #{test_name}'"
+        opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+        location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}block in #{test_name}'"
         assert_includes Mocha::Deprecation.messages.last, "Expectation defined at #{location} expected keyword arguments (key: 42)"
         assert_includes Mocha::Deprecation.messages.last, 'but received positional hash ({:key => 42})'
       end
@@ -102,7 +105,8 @@ def test_should_match_positional_and_keyword_args_with_last_positional_hash
         mock.method(1, key: 42)
       end
       if Mocha::RUBY_V27_PLUS
-        location = "#{execution_point.file_name}:#{execution_point.line_number}:in `block in #{test_name}'"
+        opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+        location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}block in #{test_name}'"
         assert_includes Mocha::Deprecation.messages.last, "Expectation defined at #{location} expected positional hash ({:key => 42})"
         assert_includes Mocha::Deprecation.messages.last, 'but received keyword arguments (key: 42)'
       end
@@ -132,7 +136,8 @@ def test_should_match_last_positional_hash_with_keyword_args
         mock.method(1, { key: 42 }) # rubocop:disable Style/BracesAroundHashParameters
       end
       if Mocha::RUBY_V27_PLUS
-        location = "#{execution_point.file_name}:#{execution_point.line_number}:in `block in #{test_name}'"
+        opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+        location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}block in #{test_name}'"
         assert_includes Mocha::Deprecation.messages.last, "Expectation defined at #{location} expected keyword arguments (key: 42)"
         assert_includes Mocha::Deprecation.messages.last, 'but received positional hash ({:key => 42})'
       end

test/unit/parameter_matchers/positional_or_keyword_hash_test.rb

@@ -6,6 +6,7 @@
 require 'mocha/parameter_matchers/instance_methods'
 require 'mocha/inspect'
 require 'mocha/expectation'
+require 'mocha/ruby_version'
 
 class PositionalOrKeywordHashTest < Mocha::TestCase
   include Mocha::ParameterMatchers
@@ -69,7 +70,8 @@ def test_should_match_hash_arg_with_keyword_args_but_display_deprecation_warning
     return unless Mocha::RUBY_V27_PLUS
 
     message = Mocha::Deprecation.messages.last
-    location = "#{execution_point.file_name}:#{execution_point.line_number}:in `new'"
+    opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+    location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}new'"
     assert_includes message, "Expectation defined at #{location} expected keyword arguments (key_1: 1, key_2: 2)"
     assert_includes message, 'but received positional hash ({:key_1 => 1, :key_2 => 2})'
     assert_includes message, 'These will stop matching when strict keyword argument matching is enabled.'
@@ -85,7 +87,8 @@ def test_should_match_keyword_args_with_hash_arg_but_display_deprecation_warning
     return unless Mocha::RUBY_V27_PLUS
 
     message = Mocha::Deprecation.messages.last
-    location = "#{execution_point.file_name}:#{execution_point.line_number}:in `new'"
+    opening_quote = Mocha::RUBY_V34_PLUS ? "'" : '`'
+    location = "#{execution_point.file_name}:#{execution_point.line_number}:in #{opening_quote}new'"
     assert_includes message, "Expectation defined at #{location} expected positional hash ({:key_1 => 1, :key_2 => 2})"
     assert_includes message, 'but received keyword arguments (key_1: 1, key_2: 2)'
     assert_includes message, 'These will stop matching when strict keyword argument matching is enabled.'