Remove string literal warning

Author: JonRowe

spec/rspec/core/formatters/base_text_formatter_spec.rb

@@ -207,7 +207,7 @@ def run_all_and_dump_failures
 
     context "with a failed message expectation (rspec-mocks)" do
       it "does not show the error class" do
-        group.example("example name") { expect("this").to receive("that") }
+        group.example("example name") { expect("this").to receive(:that) }
         run_all_and_dump_failures
         expect(formatter_output_without_formatter_module).not_to match(/RSpec::/m)
       end