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diff --git a/t/t4003-diff-rename-1.sh b/t/t4003-diff-rename-1.sh
new file mode 100755
index 0000000..8b1f875
--- /dev/null
+++ b/t/t4003-diff-rename-1.sh
@@ -0,0 +1,128 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano
+#
+
+test_description='More rename detection
+
+'
+. ./test-lib.sh
+. ../diff-lib.sh ;# test-lib chdir's into trash
+
+test_expect_success \
+ 'prepare reference tree' \
+ 'cat ../../COPYING >COPYING &&
+ echo frotz >rezrov &&
+ git update-index --add COPYING rezrov &&
+ tree=$(git write-tree) &&
+ echo $tree'
+
+test_expect_success \
+ 'prepare work tree' \
+ 'sed -e 's/HOWEVER/However/' <COPYING >COPYING.1 &&
+ sed -e 's/GPL/G.P.L/g' <COPYING >COPYING.2 &&
+ rm -f COPYING &&
+ git update-index --add --remove COPYING COPYING.?'
+
+# tree has COPYING and rezrov. work tree has COPYING.1 and COPYING.2,
+# both are slightly edited, and unchanged rezrov. So we say you
+# copy-and-edit one, and rename-and-edit the other. We do not say
+# anything about rezrov.
+
+GIT_DIFF_OPTS=--unified=0 git diff-index -M -p $tree >current
+cat >expected <<\EOF
+diff --git a/COPYING b/COPYING.1
+copy from COPYING
+copy to COPYING.1
+--- a/COPYING
++++ b/COPYING.1
+@@ -6 +6 @@
+- HOWEVER, in order to allow a migration to GPLv3 if that seems like
++ However, in order to allow a migration to GPLv3 if that seems like
+diff --git a/COPYING b/COPYING.2
+rename from COPYING
+rename to COPYING.2
+--- a/COPYING
++++ b/COPYING.2
+@@ -2 +2 @@
+- Note that the only valid version of the GPL as far as this project
++ Note that the only valid version of the G.P.L as far as this project
+@@ -6 +6 @@
+- HOWEVER, in order to allow a migration to GPLv3 if that seems like
++ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
+@@ -12 +12 @@
+- This file is licensed under the GPL v2, or a later version
++ This file is licensed under the G.P.L v2, or a later version
+EOF
+
+test_expect_success \
+ 'validate output from rename/copy detection (#1)' \
+ 'compare_diff_patch current expected'
+
+test_expect_success \
+ 'prepare work tree again' \
+ 'mv COPYING.2 COPYING &&
+ git update-index --add --remove COPYING COPYING.1 COPYING.2'
+
+# tree has COPYING and rezrov. work tree has COPYING and COPYING.1,
+# both are slightly edited, and unchanged rezrov. So we say you
+# edited one, and copy-and-edit the other. We do not say
+# anything about rezrov.
+
+GIT_DIFF_OPTS=--unified=0 git diff-index -C -p $tree >current
+cat >expected <<\EOF
+diff --git a/COPYING b/COPYING
+--- a/COPYING
++++ b/COPYING
+@@ -2 +2 @@
+- Note that the only valid version of the GPL as far as this project
++ Note that the only valid version of the G.P.L as far as this project
+@@ -6 +6 @@
+- HOWEVER, in order to allow a migration to GPLv3 if that seems like
++ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
+@@ -12 +12 @@
+- This file is licensed under the GPL v2, or a later version
++ This file is licensed under the G.P.L v2, or a later version
+diff --git a/COPYING b/COPYING.1
+copy from COPYING
+copy to COPYING.1
+--- a/COPYING
++++ b/COPYING.1
+@@ -6 +6 @@
+- HOWEVER, in order to allow a migration to GPLv3 if that seems like
++ However, in order to allow a migration to GPLv3 if that seems like
+EOF
+
+test_expect_success \
+ 'validate output from rename/copy detection (#2)' \
+ 'compare_diff_patch current expected'
+
+test_expect_success \
+ 'prepare work tree once again' \
+ 'cat ../../COPYING >COPYING &&
+ git update-index --add --remove COPYING COPYING.1'
+
+# tree has COPYING and rezrov. work tree has COPYING and COPYING.1,
+# but COPYING is not edited. We say you copy-and-edit COPYING.1; this
+# is only possible because -C mode now reports the unmodified file to
+# the diff-core. Unchanged rezrov, although being fed to
+# git diff-index as well, should not be mentioned.
+
+GIT_DIFF_OPTS=--unified=0 \
+ git diff-index -C --find-copies-harder -p $tree >current
+cat >expected <<\EOF
+diff --git a/COPYING b/COPYING.1
+copy from COPYING
+copy to COPYING.1
+--- a/COPYING
++++ b/COPYING.1
+@@ -6 +6 @@
+- HOWEVER, in order to allow a migration to GPLv3 if that seems like
++ However, in order to allow a migration to GPLv3 if that seems like
+EOF
+
+test_expect_success \
+ 'validate output from rename/copy detection (#3)' \
+ 'compare_diff_patch current expected'
+
+test_done