fix formatting issue on some whitespace characters

[warren2k]

Results containing tab (\t) or newline (\n) characters are sometimes not formatted properly, causing tests to fail. The following tests are examples:

Incorrect tab formatting example:

shell-session not-tested="formatting-issue-generating-tab"
$ ls
default.nix  hello.nix result

Incorrect newline formatting example:

shell-session not-tested="formatting-issue-generating-newline"
$ ls -R ./result
./result:
bin  system

./result/bin:
run-nixos-vm

[jfly]

Sorry, I'm not totally understanding the issue. What does "not formatted properly" mean?

[warren2k]

Sorry about that. My examples weren't as clear as I thought. In the case of the newline formatting issue, Eelco seems to be swallowing one of the newlines. Based on how the result is structured in the markdown file, the expectation should be:

'./result:\nbin system\n\n./result/bin:\nrun-nixos-vm'

but instead, it's:

'./result:\nbin system\n./result/bin:\nrun-nixos-vm'

I cannot exactly recall the behavior of the tab formatting issue and am not able to replicate it because I'm unable to run it on my mac, but my teammate is able to run it on his linux machine and get the failing result. I'll see if he can provide details for that error.