Re: [PATCH] Change sed i\ usage to something Solaris' sed can handle

Ben Walton [off-list ref] writes:

On Mon, Oct 28, 2013 at 5:39 PM, Andreas Schwab [off-list ref] wrote:

quoted

Ben Walton [off-list ref] writes:

quoted

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.

quoted

+     test_seq 5 | sed "/3/i\\
+\
 " >x &&

should be the same as

quoted

+     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