Merge pull request containers#11137 from edsantiago/helpfulerer

[CI:DOCS] tests-expect-exit: include source line numbers

Makefile

@@ -607,7 +607,7 @@ tests-included:
 
 .PHONY: tests-expect-exit
 tests-expect-exit:
-	@if egrep 'Expect.*ExitCode' test/e2e/*.go | egrep -v ', ".*"\)'; then \
+	@if egrep --line-number 'Expect.*ExitCode' test/e2e/*.go | egrep -v ', ".*"\)'; then \
 		echo "^^^ Unhelpful use of Expect(ExitCode())"; \
 		echo "   Please use '.Should(Exit(...))' pattern instead."; \
 		echo "   If that's not possible, please add an annotation (description) to your assertion:"; \