If you are manually trying to type the spoiler tags out... you aren't doing it right.
Manually: Just insert the equal sign in the first bracket. then if you want a text header for your spoiler, just type in a few words after the equal sign.
E.g:
Automatic: Just go to the advanced mode and click on the spoiler wrap icon in the editing toolbar. Easy peasy from there.
A given mission, mechanical assault, manufactured devotion.
Red eyes, an upside-down form. Even the twisted shape was made to be that way.
No matter how cruel the slaughter, worse than a demon's,
or how gentle the kindness, greater than an angel's,
a machine has neither will nor madness—only code, and a few bugs.
So why, then, does it feel so unbearably sad?