This seems trivial but I couldn't seem to find it in the documention or the mailing list archive.

Suppose I deleted a file with

p4 delete foo.c p4 submit

Now, a couple of changelists later I want to reinstate foo.c to be part of the tip. So, I get the last active foo.c by

p4 sync foo.c#3

Edit the file

p4 edit foo.c

and try to submit it and get the following message

Submitting change 86. //depot//foo.c - edit of deleted file; must revert Out of date files must be resolved or reverted. Submit failed -- fix problems above then use 'submit -c 86'.