Adjust test to error message change in #53778

[Keno]

I considered changing the error message back, but I actually think non-escaped filenames make more sense here, so I just adjusted the test. We can do either though.

[vtjnash]

I think this breaks consistency with many other file methods (though I didn't check specifically). It seems somewhat rude to windows users to make it so they can't copy paste this text, even though the " make it look like a string

[Keno]

I'll let you debate that with @JeffBezanson. I do find the double backslash somewhat ugly there. Maybe it should go into cmd ticks? Anyway, I just want CI to pass.

[IanButterworth]

I believe this is still failing?

"opening file \"C:\\buildkite-agent\\builds\\win2k22-amdci6-4\\julialang\\julia-master\\julia-299b0dd524\\share\\julia\\stdlib\\v1.12\\Distributed\\test\\testfile\""
"opening file \"C:\\\\buildkite-agent\\\\builds\\\\win2k22-amdci6-4\\\\julialang\\\\julia-master\\\\julia-299b0dd524\\\\share\\\\julia\\\\stdlib\\\\v1.12\\\\Distributed\\\\test\\\\testfile\""

[giordano]

It'd also good to rebase on master to include #53809, which fixed #53811, and reduce CI noise.

[IanButterworth]

In case this isn't resolved soon I've reopened and rebased the revert #53808 - Now merged

[JeffBezanson]

Ok I think we can put the repr's back for now. But it would be better to call some more specific string escaping function if that's what's needed.

[JeffBezanson]

Note the other error in that same function doesn't call repr, and I don't think we have a test for that error. I'm not sure how to trigger it.