<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi David,</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">It had to read your code a few times to realize what you had changed. :-) It's subtle and makes the names more consistent. I agree with your suggestion. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">As for whether or not the 'with' label should be removed from the mutable merge, I think it would work well either way. However the code is more concise without it and still reads well. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Ricardo Parada</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature"><br></div><div>On Feb 14, 2016, at 11:52 AM, David Hart via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br><br></div><blockquote type="cite"><div class=""><font face="Menlo" class="">a.members(notIn: b)</font></div><div class=""></div></blockquote></body></html>