Correct grammar problem
Correct grammar problem

rlewis1988/logic_and_proof,leanprover/logic_and_proof,rlewis1988/logic_and_proof,avigad/logic_and_proof,leanprover/logic_and_proof,leanprover/logic_and_proof,rlewis1988/logic_and_proof,avigad/logic_and_proof,avigad/logic_and_proof