add a side note and an additional example of the semantic differences.
add a side note and an additional example of the semantic differences.

todc/todc-bootstrap,aaroncnhk/todc-bootstrap,mozillo/todc-bootstrap,todc/todc-bootstrap,2947721120/googlebt4,2947721120/todc-bootstrap,up2vs/todc-bootstrap,todc/todc-bootstrap,ztx1491/todc-bootstrap