"Cannot copy a file over itself" dialog should include the file paths

Prerequisites

• I have searched open and closed issues for duplicates.

Describe the bug

I was copying a bunch of files from one directory to another, and I didn't realise that two of the files I was copying were actually symlinks to the directory I was copying them to. So I got this message popup:

Ok, no worries, except that it doesn't tell me what file(s) it's referring to. I had to manually check the source and destination files to see what was different before I realised what the issue was.

A simple addition of the filename in question to this dialog would be a good idea.

Platform Information

• I'm using the latest version from git that I've manually compiled
• I'm using the latest released stable version

[jeremypw]

Sounds reasonable. Need to decide on suitable wording.

[mrbvrz]

Yup I seem to have the same issue, I think because of the latest Files update, Paste into a selected folder when using Ctrl + V

[jeremypw]

The relevant code appears unchanged so this needs addressing.

[jeremypw]

This does not seem to be a problem as described in OS8.1 - it is valid to copy a link to the destination into the destination so the warning does not appear. However it is still invalid to copy a child folder into itself. The message now reads "The destination folder is inside the source folder". It is still a reasonable request to include the actual file paths in the message though.