Update: Change "exists" to "exist" in fakefile syntax.

Update: Change "exists" to "exist" in fakefile syntax.

The use of "exists" is grammatically correct and the use of "exist" is grammatically incorrect.
This is not in English grammar.
The practices of this project are to focus on using "s" strictly for plural.
The practices of this project are to use simple or base words more often.

The area in which proper grammar is allowed is when interacting with the user rather than with code.
A project like Fake has a target user who is a programmer.
This is a grey area.

The project is already using "if define" rather than "if defined".
For the purpose of keeping a consistent design, I am favoring "exist" over "exists" for this grey area.
Another bonus is that "exist" is shorter than "exists" (however trivial).