join files recipe - remove './' from example, fixes #457

[kieranjol]

This hopefully fixes #457 .
I added a note as well that the file path should not be the absolute path in the textfile. I think that this might be less obvious now that the ./ has been removed in the example.
Edit: I didn't use the term 'relative path' as I was worried that this might lead people to want to use the './'

[kfrn]

Cheers @kieranjol! That LGTM as a quick update.

Any chance you'd want to expand at all? @brainwane put it perfectly:

So, it sounds like the recipe should advise people: if possible, run the command from the same directory where the files and the txt file reside. Otherwise you'll have to use safe (and here's how).

Otherwise, I could look at this later on.

[privatezero]

Looks good to me, although I agree that the little additional clarification suggested by @brainwane and @kfrn - I find that whenever I use concat that I tend to do exactly what is mentioned there so seems kind to users to include that tidbit!

[kieranjol]

Desperately hoping that I did this correctly, it's been a while since I made commits within github itself! I totally agree that it should have been added in in the first place!

[kieranjol]

Also that intro seemed like the best place to put it?

[kfrn]

LGTM @kieranjol!

[kieranjol]

Can this be merged?

[kieranjol]

Just remembered that I can merge it after the approvals! Thx folks.