git/t/t4013/diff.diff_-U2_initial..side

$ git diff -U2 initial..side
diff --git a/dir/sub b/dir/sub
index 35d242b..7289e35 100644
--- a/dir/sub
+++ b/dir/sub
@@ -1,2 +1,4 @@
 A
 B
+1
+2
diff --git a/file0 b/file0
index 01e79c3..f4615da 100644
--- a/file0
+++ b/file0
@@ -2,2 +2,5 @@
 2
 3
+A
+B
+C
diff --git a/file3 b/file3
new file mode 100644
index 0000000..7289e35
--- /dev/null
+++ b/file3
@@ -0,0 +1,4 @@
+A
+B
+1
+2
$
diff-parseopt: restore -U (no argument) behavior Before d473e2e0e8 (diff.c: convert -U\|--unified, 2019-01-27), -U and --unified are implemented with a custom parser opt_arg() in diff.c. I didn't check this code carefully and not realize that it's the equivalent of PARSE_OPT_NONEG \| PARSE_OPT_OPTARG. In other words, if -U is specified without any argument, the option should be accepted, and the default value should be used. Without PARSE_OPT_OPTARG, parse_options() will reject this case and cause a regression. Reported-by: Bryan Turner <bturner@atlassian.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> 2019-05-29 09:11:15 +00:00			`$ git diff -U2 initial..side`
			`diff --git a/dir/sub b/dir/sub`
			`index 35d242b..7289e35 100644`
			`--- a/dir/sub`
			`+++ b/dir/sub`
			`@@ -1,2 +1,4 @@`
			`A`
			`B`
			`+1`
			`+2`
			`diff --git a/file0 b/file0`
			`index 01e79c3..f4615da 100644`
			`--- a/file0`
			`+++ b/file0`
			`@@ -2,2 +2,5 @@`
			`2`
			`3`
			`+A`
			`+B`
			`+C`
			`diff --git a/file3 b/file3`
			`new file mode 100644`
			`index 0000000..7289e35`
			`--- /dev/null`
			`+++ b/file3`
			`@@ -0,0 +1,4 @@`
			`+A`
			`+B`
			`+1`
			`+2`
			`$`