Check ruby-related includes only [ci skip]

common.mk

@@ -741,7 +741,7 @@ check: main test test-tool test-all test-spec
 	if [ x"$(GIT)" != x ] && $(CHDIR) "$(srcdir)" && \
 	    b=`$(GIT) symbolic-ref --short HEAD 2>&1` && \
 	    u=`$(GIT) branch --list --format='%(upstream:short)' $$b`; then \
-	  set -x; $(GIT) --no-pager log --format=oneline -G "^ *# *include" $$u..HEAD --; \
+	  set -x; $(GIT) --no-pager log --format=oneline -G '^ *# *include *("|<ruby)' $$u..HEAD --; \
 	fi
 check-ruby: test test-ruby