Ben Walton <bdwalton@xxxxxxxxx> writes:
> On Mon, Oct 28, 2013 at 5:39 PM, Andreas Schwab <schwab@xxxxxxxxxxxxxx> wrote:
>> Ben Walton <bdwalton@xxxxxxxxx> writes:
>>
>>> diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
>>> index 3fb4b97..0126154 100755
>>> --- a/t/t4015-diff-whitespace.sh
>>> +++ b/t/t4015-diff-whitespace.sh
>>> @@ -145,7 +145,8 @@ test_expect_success 'another test, with --ignore-space-at-eol' 'test_cmp expect
>>> test_expect_success 'ignore-blank-lines: only new lines' '
>>> test_seq 5 >x &&
>>> git update-index x &&
>>> - test_seq 5 | sed "/3/i \\
>>> + test_seq 5 | sed "/3/i\\
>>> +\
>>> " >x &&
>>
>> Why do you need the \<nl>? Since it is inside double quotes the shell
>> will remove it during expansion.
>
> It's an escape. Without it, sed throws:
>
> sed: -e expression #1, char 5: expected \ after `a', `c' or `i'
I think Andreas means the "feed blank line" part, i.e.
>> + test_seq 5 | sed "/3/i\\
>> +\
>> " >x &&
should be the same as
>> + test_seq 5 | sed "/3/i\\
>> " >x &&
because the lone \<nl> will be eaten and will not be seen by sed.
Do you see different results on Solaris between the following two?
$ echo "/3/i\\
\
" | od
$ echo "/3/i\\
" | od
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