Re: [PATCH v12 1/5] t0040-test-parse-options.sh: fix style issues

> On Mon, Apr 4, 2016 at 8:45 AM, Pranit Bauva <pranit.bauva@gmail.com> wrote:
>> Okay I will do the change. I was previously unaware about the use of
>> '\' before EOF. I googled it now. But I am still confused about its
>> use in this scenario. Upto what I understood, it is used where you
>> want to expand a variable, substitute a command, arithmethic
>> expansion. The use of '\' in the tests I have changed in v12 wrt 11 is
>> understood by me as you want to remove the use of escape sequences
>> which is justified. But this seems a bit vague. Is it some convention
>> in git?
>
> Both 'EOF' and \EOF suppress interpolation and other transformations
> in the heredoc content which would otherwise occur with plain EOF. The
> 'EOF' form is well documented; \EOF not so much, but is used heavily
> in git test scripts. So:
>
>     x=flormp
>     echo <<EOF
>     Hello, $x
>     EOF
>
> prints "Hello, flormp", whereas:
>
>     echo <<\EOF
>     Hello, $x
>     EOF
>
> prints "Hello, $x".
>
> While test scripts sometimes use \EOF to explicitly suppress variable
> expansion, it's also quite common to use it even when there is nothing
> which could be expanded in the heredoc content, in which case it
> signals to the reader that the author doesn't expect the content to
> undergo expansion or interpolation. It's also a bit of future-proofing
> in case some later change to the heredoc content inserts something
> which might otherwise be expanded.