Exclusion Question using ! in .stignore

Regarding the ignore feature, if I were to use this:

!This Folder Name
**

Am I understanding correctly, that ONLY the folder “This Folder Name” will be included, or will anything with This and Folder and Name also be included?

So if I have two folders:

/Tub of Chocolate
/Tub of Butter

…and I want ONLY to include /Tub of Butter,

I would add:

!Tub of Butter
**

…to the stignore?

Yes. Spaces are not special.

Thanks!

!Tub of Butter
*

is enough (single ending *)