Enable code-coverage result for test-syntax-suggest

common.mk

@@ -1472,7 +1472,8 @@ PREPARE_SYNTAX_SUGGEST = test-syntax-suggest-prepare
 test-syntax-suggest: $(TEST_RUNNABLE)-test-syntax-suggest
 yes-test-syntax-suggest: yes-$(PREPARE_SYNTAX_SUGGEST)
 	$(XRUBY) -C $(srcdir) -Ispec/syntax_suggest:spec/lib .bundle/bin/rspec \
-		--require spec_helper --require formatter_overrides $(RSPECOPTS) spec/syntax_suggest/$(SYNTAX_SUGGEST_SPECS)
+		--require spec_helper --require formatter_overrides --require spec_coverage \
+		$(RSPECOPTS) spec/syntax_suggest/$(SYNTAX_SUGGEST_SPECS)
 no-test-syntax-suggest:
 
 check: $(DOT_WAIT) $(TEST_RUNNABLE)-$(PREPARE_SYNTAX_SUGGEST) test-syntax-suggest

spec/lib/spec_coverage.rb

@@ -0,0 +1 @@
+require_relative "../../tool/test-coverage" if ENV.key?('COVERAGE')