1. left bracket (next to letter P on keyboard) [
2. type the word trigger
3. right bracket (next to left bracket on keyboard) ]
4. type the potentially triggering information
5. left bracket [
6. slash (above the number 8 if you have ten key or on the same key as the question mark) /
7. type the word trigger
8. right bracket ]

Possible trigger:

spoiler alert! Dean becomes a demon!

See if that worked? LOL

I had to copy the instructions from CSC! Thanks, CSC! I suck at code.