Conflicting Lint/UnusedBlockArgument & Style/SingleLineBlockParams

[deivid-rodriguez]

I have this line of code that counts the number of lines in a file

File.foreach(filename).reduce(0) { |a, e| a + 1 }

but I get complaints from the Lint/UnusedBlockArgument cop.

W: Lint/UnusedBlockArgument: Unused block argument - e. If it's necessary, use _ or _e as an argument name to indicate that it won't be used.

So I change it to

File.foreach(filename).reduce(0) { |a, _e| a + 1 }

but now the Style/SingleLineBlockParams cop complains...

C: Style/SingleLineBlockParams: Name reduce block params |a, e|.

Maybe the block param names should not be enforced if they start with an underscore?

[deivid-rodriguez]

Thanks @jonas054 !