improved argument error message in case block is not passed to matcher

Author: skatkov

lib/rspec/rails/matchers/have_reported_error.rb

@@ -40,7 +40,7 @@ def and(_)
 
         def matches?(block)
           if block.nil?
-            raise ArgumentError, "block is required for have_reported_error matcher"
+            raise ArgumentError, "this matcher doesn’t work with value expectations"
           end
 
           @error_subscriber = ErrorSubscriber.new

spec/rspec/rails/matchers/have_reported_error_spec.rb

@@ -11,7 +11,7 @@ class AnotherTestError < StandardError; end
   it "warns that passing value expectation doesn't work" do
     expect {
       expect(Rails.error.report(StandardError.new("test error"))).to have_reported_error
-    }.to raise_error(ArgumentError, "block is required for have_reported_error matcher")
+    }.to raise_error(ArgumentError, "this matcher doesn’t work with value expectations")
   end
 
   describe "basic functionality" do