I was recently asked to review a paper (for a very reputable journal). In the cover letter, it says
"This paper has been checked with turnitin to ensure there is no similarity to other papers."
I haven't seen this before (although I have limited reviewing experience). Is this normal? Or does this indicate something strange about the author?
I've never checked any of my own papers for plagiarism. Should I?
EDIT: Also, why would you mention this in the cover letter?