GNU bug report logs - #77615
difference in diff -wB with and without -u

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Package: diffutils;

Reported by: Aaron Davies <aaron.davies <at> gmail.com>

Date: Mon, 7 Apr 2025 18:26:02 UTC

Severity: normal

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Report forwarded to bug-diffutils <at> gnu.org:
bug#77615; Package diffutils. (Mon, 07 Apr 2025 18:26:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to Aaron Davies <aaron.davies <at> gmail.com>:
New bug report received and forwarded. Copy sent to bug-diffutils <at> gnu.org. (Mon, 07 Apr 2025 18:26:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Aaron Davies <aaron.davies <at> gmail.com>
To: bug-diffutils <at> gnu.org
Subject: difference in diff -wB with and without -u
Date: Mon, 7 Apr 2025 14:25:29 -0400

this pair of files shows one line of difference with diff -wB and two
with diff -uwB

is this expected?

$ ./show
+ cat -vet a
    $
    a$
    b$
  $
+ cat -vet b
    a$
$
+ diff -wB a b
3d1
<     b
+ diff -uwB a b
--- a 2025-04-04 17:41:34.684282476 -0400
+++ b 2025-04-04 17:42:13.171166665 -0400
@@ -1,4 +1,2 @@
-
     a
-    b

+ diff --version
+ sed q
diff (GNU diffutils) 3.11
$
-- 
Aaron Davies
aaron.davies <at> gmail.com
This bug report was last modified 5 days ago.

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