fills duplicated lambda argument that has already been added as trailing lambda

[oboenikui]

Trailing lambdas placed outside of parentheses should not be added, but they are.

https://user-images.githubusercontent.com/3191462/209628892-c8b9aa90-e525-47a4-9df6-4d66a3f01f2f.mp4

In this movie, completion of second foo is buggy.