Merge pull request #16415 from HuKeping/dockerinfo

Format output of docker info
Upstream-commit: 40e856041265d6030768286f1b228f042c0f768b
Component: engine

components/engine/pkg/ioutils/fmt.go

@@ -12,3 +12,11 @@ func FprintfIfNotEmpty(w io.Writer, format, value string) (int, error) {
 	}
 	return 0, nil
 }
+
+// FprintfIfTrue prints the boolean value if it's true
+func FprintfIfTrue(w io.Writer, format string, ok bool) (int, error) {
+	if ok {
+		return fmt.Fprintf(w, format, ok)
+	}
+	return 0, nil
+}