Add post-merge hook, related documentation, and tests.

diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh
index 8345ef5bf76cbf9ce2cebd962fa36c1f7ce445da..9eec754221d85856613b01ec878ef4cb492aceb0 100755 (executable)
--- a/t/t4013-diff-various.sh
+++ b/t/t4013-diff-various.sh
@@ -17,6 +17,7 @@ test_expect_success setup '
        export GIT_AUTHOR_DATE GIT_COMMITTER_DATE &&
 
        mkdir dir &&
+       mkdir dir2 &&
        for i in 1 2 3; do echo $i; done >file0 &&
        for i in A B; do echo $i; done >dir/sub &&
        cat file0 >file2 &&
@@ -111,7 +112,7 @@ do
                } >"$actual" &&
                if test -f "$expect"
                then
-                       diff -u "$expect" "$actual" &&
+                       git diff "$expect" "$actual" &&
                        rm -f "$actual"
                else
                        # this is to help developing new tests.
@@ -241,6 +242,9 @@ format-patch --attach --stdout initial..master
 format-patch --inline --stdout initial..side
 format-patch --inline --stdout initial..master^
 format-patch --inline --stdout initial..master
+format-patch --inline --stdout --subject-prefix=TESTCASE initial..master
+config format.subjectprefix DIFFERENT_PREFIX
+format-patch --inline --stdout initial..master^^
 
 diff --abbrev initial..side
 diff -r initial..side
@@ -251,6 +255,7 @@ diff --patch-with-stat initial..side
 diff --patch-with-raw initial..side
 diff --patch-with-stat -r initial..side
 diff --patch-with-raw -r initial..side
+diff --name-status dir2 dir
 EOF
 
 test_done