[Bug-tar] [PATCH] tests: port to Solaris diff

[Paul Eggert]

I found a porting bug when testing on Solaris with all GNU tools out
of the PATH, and pushed the following patch:

* tests/extrac13.at: Don't assume that "diff -c" outputs nothing
when there are no differences.  This is not true on Solaris,
where it outputs "No differences encountered".
---
 tests/extrac13.at |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/tests/extrac13.at b/tests/extrac13.at
index 2abed72..7c03e02 100644
--- a/tests/extrac13.at
+++ b/tests/extrac13.at
@@ -33,20 +33,20 @@ echo target1 >target1
 
 tar -cf archive.tar -C src . &&
 tar -xf archive.tar -C dst1 --warning=no-timestamp &&
-diff -c src/file1 dst1/file1 &&
-diff -c target1 dst1/target1
+diff src/file1 dst1/file1 &&
+diff target1 dst1/target1
 
 ln -s target1 dst2/file1
 echo target1 >dst2/target1
 tar --overwrite -xf archive.tar -C dst2 --warning=no-timestamp &&
-diff -c src/file1 dst2/file1 &&
-diff -c target1 dst2/target1
+diff src/file1 dst2/file1 &&
+diff target1 dst2/target1
 
 ln -s target1 dst3/file1
 echo target1 >dst3/target1
 tar --overwrite -xhf archive.tar -C dst3 --warning=no-timestamp &&
-diff -c src/file1 dst3/file1 &&
-diff -c src/file1 dst3/target1
+diff src/file1 dst3/file1 &&
+diff src/file1 dst3/target1
 ],
 [0],[],[],[],[],[gnu])
 
-- 
1.7.2